diff --git a/crypto/sol/app.py b/crypto/sol/app.py
index 56423a5..405ed53 100644
--- a/crypto/sol/app.py
+++ b/crypto/sol/app.py
@@ -41,7 +41,7 @@ load_dotenv()
 # Load secret environment variables
 load_dotenv('.env.secret')
 pk = os.getenv("PK")
-if not pk
+if not pk:
     logging.error("Private key not found in environment variables. Will not be able to sign transactions.")