diff --git a/src/server/lib/runtime-env.ts b/src/server/lib/runtime-env.ts
index 0841f61..cf8748f 100644
--- a/src/server/lib/runtime-env.ts
+++ b/src/server/lib/runtime-env.ts
@@ -26,7 +26,7 @@ export function getEnvValueSync(
     return processValue;
   }
   const value: unknown = Reflect.get(env, name);
-  return typeof value === "string" ? value : undefined;
+  return typeof value === "string" && value !== "" ? value : undefined;
 }
 
 export async function getRequiredEnvValue(name: string): Promise<string> {