diff --git a/.ergomake/docker-compose.yml b/.ergomake/docker-compose.yml
index e16ded42a..f657ad711 100644
--- a/.ergomake/docker-compose.yml
+++ b/.ergomake/docker-compose.yml
@@ -19,7 +19,7 @@ services:
       - "3000:3000"
     environment:
       DEBUG_MODE: false
-      IS_SIGN_IN_PREFILLED: true
+      SIGN_IN_PREFILLED: true
       ACCESS_TOKEN_SECRET: "secret_jwt"
       LOGIN_TOKEN_SECRET: "secret_login_token"
       REFRESH_TOKEN_SECRET: "secret_refresh_token"
diff --git a/server/.env.example b/server/.env.example
index f3f95f6af..c2be24d6f 100644
--- a/server/.env.example
+++ b/server/.env.example
@@ -3,7 +3,7 @@ FRONT_BASE_URL=http://localhost:3001
 ACCESS_TOKEN_SECRET=replace_me_with_a_random_string
 LOGIN_TOKEN_SECRET=replace_me_with_a_random_string
 REFRESH_TOKEN_SECRET=replace_me_with_a_random_string
-IS_SIGN_IN_PREFILLED=true
+SIGN_IN_PREFILLED=true
 
 # ———————— Optional ————————
 # DEBUG_MODE=true
diff --git a/server/.env.test b/server/.env.test
index 7706883a1..952b6f30b 100644
--- a/server/.env.test
+++ b/server/.env.test
@@ -10,7 +10,7 @@ REFRESH_TOKEN_SECRET=secret_refresh_token
 
 # ———————— Optional ————————
 # DEBUG_MODE=false
-# IS_SIGN_IN_PREFILLED=false
+# SIGN_IN_PREFILLED=false
 # ACCESS_TOKEN_EXPIRES_IN=30m
 # LOGIN_TOKEN_EXPIRES_IN=15m
 # REFRESH_TOKEN_EXPIRES_IN=90d 
diff --git a/server/src/integrations/environment/environment.service.ts b/server/src/integrations/environment/environment.service.ts
index 8c49a2b0f..2fbe02703 100644
--- a/server/src/integrations/environment/environment.service.ts
+++ b/server/src/integrations/environment/environment.service.ts
@@ -14,7 +14,7 @@ export class EnvironmentService {
   }
 
   isSignInPrefilled(): boolean {
-    return this.configService.get<boolean>('IS_SIGN_IN_PREFILLED') ?? false;
+    return this.configService.get<boolean>('SIGN_IN_PREFILLED') ?? false;
   }
 
   isTelemetryEnabled(): boolean {
diff --git a/server/src/integrations/environment/environment.validation.ts b/server/src/integrations/environment/environment.validation.ts
index 270e2387a..d18086118 100644
--- a/server/src/integrations/environment/environment.validation.ts
+++ b/server/src/integrations/environment/environment.validation.ts
@@ -27,7 +27,7 @@ export class EnvironmentVariables {
   @CastToBoolean()
   @IsOptional()
   @IsBoolean()
-  IS_SIGN_IN_PREFILLED?: boolean;
+  SIGN_IN_PREFILLED?: boolean;
 
   @CastToBoolean()
   @IsOptional()