diff --git a/app/Jobs/ApplicationDeploymentJob.php b/app/Jobs/ApplicationDeploymentJob.php
index 098cf7804..09068fba4 100644
--- a/app/Jobs/ApplicationDeploymentJob.php
+++ b/app/Jobs/ApplicationDeploymentJob.php
@@ -1293,12 +1293,8 @@ class ApplicationDeploymentJob implements ShouldBeEncrypted, ShouldQueue
             $sorted_environment_variables_preview = $this->application->runtime_environment_variables_preview->sortBy('id');
         }
         if ($this->build_pack === 'dockercompose') {
-            $sorted_environment_variables = $sorted_environment_variables->filter(function ($env) {
-                return ! str($env->key)->startsWith('SERVICE_FQDN_') && ! str($env->key)->startsWith('SERVICE_URL_') && ! str($env->key)->startsWith('SERVICE_NAME_');
-            });
-            $sorted_environment_variables_preview = $sorted_environment_variables_preview->filter(function ($env) {
-                return ! str($env->key)->startsWith('SERVICE_FQDN_') && ! str($env->key)->startsWith('SERVICE_URL_') && ! str($env->key)->startsWith('SERVICE_NAME_');
-            });
+            $sorted_environment_variables = $sorted_environment_variables->reject(fn (EnvironmentVariable $env) => $this->isGeneratedDockerComposeEnvironmentVariable($env));
+            $sorted_environment_variables_preview = $sorted_environment_variables_preview->reject(fn (EnvironmentVariable $env) => $this->isGeneratedDockerComposeEnvironmentVariable($env));
         }
         $ports = $this->application->main_port();
         $coolify_envs = $this->generate_coolify_env_variables();
@@ -1451,6 +1447,15 @@ class ApplicationDeploymentJob implements ShouldBeEncrypted, ShouldQueue
         return $envs;
     }
 
+    private function isGeneratedDockerComposeEnvironmentVariable(EnvironmentVariable $environmentVariable): bool
+    {
+        $key = str($environmentVariable->key);
+
+        return $key->startsWith('SERVICE_FQDN_')
+            || $key->startsWith('SERVICE_URL_')
+            || $key->startsWith('SERVICE_NAME_');
+    }
+
     private function save_runtime_environment_variables()
     {
         // This method saves the .env file with ALL runtime variables
@@ -1666,11 +1671,9 @@ class ApplicationDeploymentJob implements ShouldBeEncrypted, ShouldQueue
                 ->orderBy($this->application->settings->is_env_sorting_enabled ? 'key' : 'id')
                 ->get();
 
-            // For Docker Compose, filter out SERVICE_FQDN and SERVICE_URL as we generate these
+            // For Docker Compose, filter out generated SERVICE_* variables as we generate these
             if ($this->build_pack === 'dockercompose') {
-                $sorted_environment_variables = $sorted_environment_variables->filter(function ($env) {
-                    return ! str($env->key)->startsWith('SERVICE_FQDN_') && ! str($env->key)->startsWith('SERVICE_URL_');
-                });
+                $sorted_environment_variables = $sorted_environment_variables->reject(fn (EnvironmentVariable $env) => $this->isGeneratedDockerComposeEnvironmentVariable($env));
             }
 
             foreach ($sorted_environment_variables as $env) {
@@ -1719,11 +1722,9 @@ class ApplicationDeploymentJob implements ShouldBeEncrypted, ShouldQueue
                 ->orderBy($this->application->settings->is_env_sorting_enabled ? 'key' : 'id')
                 ->get();
 
-            // For Docker Compose, filter out SERVICE_FQDN and SERVICE_URL as we generate these with PR-specific values
+            // For Docker Compose, filter out generated SERVICE_* variables as we generate these with PR-specific values
             if ($this->build_pack === 'dockercompose') {
-                $sorted_environment_variables = $sorted_environment_variables->filter(function ($env) {
-                    return ! str($env->key)->startsWith('SERVICE_FQDN_') && ! str($env->key)->startsWith('SERVICE_URL_');
-                });
+                $sorted_environment_variables = $sorted_environment_variables->reject(fn (EnvironmentVariable $env) => $this->isGeneratedDockerComposeEnvironmentVariable($env));
             }
 
             foreach ($sorted_environment_variables as $env) {
@@ -3019,6 +3020,10 @@ COPY ./nginx.conf /etc/nginx/conf.d/default.conf");
                 ->where('is_buildtime', true)
                 ->get();
 
+            if ($this->build_pack === 'dockercompose') {
+                $envs = $envs->reject(fn (EnvironmentVariable $env) => $this->isGeneratedDockerComposeEnvironmentVariable($env));
+            }
+
             foreach ($envs as $env) {
                 $resolvedValue = $env->getResolvedValueWithServer($this->mainServer);
                 if (! is_null($resolvedValue)) {
@@ -3031,6 +3036,10 @@ COPY ./nginx.conf /etc/nginx/conf.d/default.conf");
                 ->where('is_buildtime', true)
                 ->get();
 
+            if ($this->build_pack === 'dockercompose') {
+                $envs = $envs->reject(fn (EnvironmentVariable $env) => $this->isGeneratedDockerComposeEnvironmentVariable($env));
+            }
+
             foreach ($envs as $env) {
                 $resolvedValue = $env->getResolvedValueWithServer($this->mainServer);
                 if (! is_null($resolvedValue)) {
diff --git a/tests/Feature/ApplicationDeploymentControlVarFilteringTest.php b/tests/Feature/ApplicationDeploymentControlVarFilteringTest.php
index d728f5ad7..83244c567 100644
--- a/tests/Feature/ApplicationDeploymentControlVarFilteringTest.php
+++ b/tests/Feature/ApplicationDeploymentControlVarFilteringTest.php
@@ -205,6 +205,127 @@ it('filters buildpack control vars from preview build-time env files', function
     expect($buildtimeEnvs->contains(fn (string $env) => str($env)->startsWith('RAILPACK_NODE_VERSION=')))->toBeFalse();
 });
 
+it('does not let preview docker compose service names override generated build-time service names', function () {
+    $compose = <<<'YAML'
+services:
+  app:
+    image: nginx
+  postgresapp:
+    image: postgres:16-alpine
+YAML;
+
+    [$application, $server] = makeDeploymentControlVarFixture([
+        'build_pack' => 'dockercompose',
+        'docker_compose_raw' => $compose,
+        'docker_compose' => $compose,
+        'docker_compose_domains' => '[]',
+    ]);
+
+    createApplicationEnvironmentVariable($application, [
+        'key' => 'SERVICE_NAME_POSTGRESAPP',
+        'value' => '',
+        'is_preview' => true,
+        'is_runtime' => true,
+        'is_buildtime' => true,
+    ]);
+
+    createApplicationEnvironmentVariable($application, [
+        'key' => 'SERVICE_URL_APP',
+        'value' => '',
+        'is_preview' => true,
+        'is_runtime' => true,
+        'is_buildtime' => true,
+    ]);
+
+    [$job, $reflection] = makeControlVarFilteringJob($application, $server, [
+        'pull_request_id' => 241,
+    ]);
+
+    /** @var Collection $buildtimeEnvs */
+    $buildtimeEnvs = invokeDeploymentJobMethod($job, $reflection, 'generate_buildtime_environment_variables');
+    $envString = $buildtimeEnvs->implode("\n");
+
+    expect($envString)->toContain("SERVICE_NAME_POSTGRESAPP='postgresapp-pr-241'");
+    expect($envString)->not->toContain('SERVICE_NAME_POSTGRESAPP=""');
+    expect($envString)->not->toContain('SERVICE_URL_APP=');
+});
+
+it('does not let production docker compose service names override generated build-time service names', function () {
+    $compose = <<<'YAML'
+services:
+  app:
+    image: nginx
+  postgresapp:
+    image: postgres:16-alpine
+YAML;
+
+    [$application, $server] = makeDeploymentControlVarFixture([
+        'build_pack' => 'dockercompose',
+        'docker_compose_raw' => $compose,
+        'docker_compose' => $compose,
+        'docker_compose_domains' => '[]',
+    ]);
+
+    createApplicationEnvironmentVariable($application, [
+        'key' => 'SERVICE_NAME_POSTGRESAPP',
+        'value' => 'stale-postgresapp',
+        'is_runtime' => true,
+        'is_buildtime' => true,
+    ]);
+
+    [$job, $reflection] = makeControlVarFilteringJob($application, $server);
+
+    /** @var Collection $buildtimeEnvs */
+    $buildtimeEnvs = invokeDeploymentJobMethod($job, $reflection, 'generate_buildtime_environment_variables');
+    $envString = $buildtimeEnvs->implode("\n");
+
+    expect($envString)->toContain("SERVICE_NAME_POSTGRESAPP='postgresapp'");
+    expect($envString)->not->toContain('stale-postgresapp');
+});
+
+it('filters docker compose generated service variables from build args', function () {
+    [$application, $server] = makeDeploymentControlVarFixture([
+        'build_pack' => 'dockercompose',
+    ]);
+
+    createApplicationEnvironmentVariable($application, [
+        'key' => 'APP_ENV',
+        'value' => 'production',
+        'is_preview' => true,
+        'is_runtime' => true,
+        'is_buildtime' => true,
+    ]);
+
+    createApplicationEnvironmentVariable($application, [
+        'key' => 'SERVICE_NAME_POSTGRESAPP',
+        'value' => '',
+        'is_preview' => true,
+        'is_runtime' => true,
+        'is_buildtime' => true,
+    ]);
+
+    createApplicationEnvironmentVariable($application, [
+        'key' => 'SERVICE_URL_APP',
+        'value' => 'https://preview.example.com',
+        'is_preview' => true,
+        'is_runtime' => true,
+        'is_buildtime' => true,
+    ]);
+
+    [$job, $reflection] = makeControlVarFilteringJob($application, $server, [
+        'pull_request_id' => 241,
+    ]);
+
+    invokeDeploymentJobMethod($job, $reflection, 'generate_env_variables');
+
+    /** @var Collection $envArgs */
+    $envArgs = readDeploymentJobProperty($job, $reflection, 'env_args');
+
+    expect($envArgs->get('APP_ENV'))->toBe('production');
+    expect($envArgs->has('SERVICE_NAME_POSTGRESAPP'))->toBeFalse();
+    expect($envArgs->has('SERVICE_URL_APP'))->toBeFalse();
+});
+
 it('filters buildpack control vars from preview runtime env fallback', function () {
     [$application, $server] = makeDeploymentControlVarFixture();