diff --git a/src/error.c b/src/error.c
index a6a19f3..d3b66cc 100644
--- a/src/error.c
+++ b/src/error.c
@@ -53,7 +53,7 @@ int errorMessage(int errorCode)
 		returnValue = -12;
 		break;
 	default:
-	//	puts("Error code unknown.");
+		return -13;
 	}
 	return returnValue;
 }