diff --git a/src/backend/utils/adt/format_type.c b/src/backend/utils/adt/format_type.c
index 84a1b3c72b0..6ae2a31345f 100644
--- a/src/backend/utils/adt/format_type.c
+++ b/src/backend/utils/adt/format_type.c
@@ -26,8 +26,6 @@
 #include "utils/syscache.h"
 #include "mb/pg_wchar.h"
 
-#define MAX_INT32_LEN 11
-
 static char *printTypmod(const char *typname, int32 typmod, Oid typmodout);