diff --git a/encrypt-model-ebg.py b/encrypt-model-ebg.py
index daeb3e9..cd8f97a 100755
--- a/encrypt-model-ebg.py
+++ b/encrypt-model-ebg.py
@@ -361,12 +361,12 @@ def _generate_policy(self, security_config):
 
         for input_desc in input_descs:
             if input_desc not in INPUT_TYPE_TO_ID:
-                print(f"Invalid input security policy {input_desc} (valid policies: {", ".join(INPUT_TYPE_TO_ID)})")
+                print(f"Invalid input security policy {input_desc} (valid policies: {', '.join(INPUT_TYPE_TO_ID)})")
                 exit(1)
             
         for output_desc in output_descs:
             if output_desc not in OUTPUT_TYPE_TO_ID:
-                print(f"Invalid output security policy {output_desc} (valid policies: {", ".join(OUTPUT_TYPE_TO_ID)})")
+                print(f"Invalid output security policy {output_desc} (valid policies: {', '.join(OUTPUT_TYPE_TO_ID)})")
                 exit(1)
 
         print("Using security policy for inputs:")