diff --git a/src/common/backend/catalog/pg_proc.cpp b/src/common/backend/catalog/pg_proc.cpp
index 7597505ee..0783ff331 100644
--- a/src/common/backend/catalog/pg_proc.cpp
+++ b/src/common/backend/catalog/pg_proc.cpp
@@ -1354,7 +1354,7 @@ Oid ProcedureCreate(const char* procedureName, Oid procNamespace, Oid propackage
             values[Anum_pg_proc_allargtypes - 1] = PointerGetDatum(dummy);
             values[Anum_pg_proc_allargtypesext - 1] = PointerGetDatum(allParameterTypes);
         }
-    } else if (parameterTypes != PointerGetDatum(NULL)) {
+    } else if (parameterTypes != NULL) {
         values[Anum_pg_proc_allargtypes - 1] = values[Anum_pg_proc_proargtypes - 1];
         values[Anum_pg_proc_allargtypesext - 1] = values[Anum_pg_proc_proargtypesext - 1];
         nulls[Anum_pg_proc_allargtypesext - 1] = nulls[Anum_pg_proc_proargtypesext - 1];