diff --git a/src/sqlancer/postgres/gen/PostgresCommon.java b/src/sqlancer/postgres/gen/PostgresCommon.java
index eeb160a56..180b4e449 100644
--- a/src/sqlancer/postgres/gen/PostgresCommon.java
+++ b/src/sqlancer/postgres/gen/PostgresCommon.java
@@ -123,6 +123,7 @@ private static List<String> getToCharFunctionErrors() {
         errors.add("cannot use \"PR\" and \"S\"/\"PL\"/\"MI\"/\"SG\" together");
         errors.add("is not a number");
         errors.add("\"EEEE\" must be the last pattern used");
+        errors.add("is incompatible with other formats");
 
         return errors;
     }