diff --git a/src/backend/parser/gram.y b/src/backend/parser/gram.y
index fccc26964a0..8ec9f1f265c 100644
--- a/src/backend/parser/gram.y
+++ b/src/backend/parser/gram.y
@@ -17982,6 +17982,7 @@ unreserved_keyword:
 			| DECLARE
 			| DEFAULTS
 			| DEFERRED
+			| DEFINE
 			| DEFINER
 			| DELETE_P
 			| DELIMITER
@@ -18402,7 +18403,6 @@ reserved_keyword:
 			| CURRENT_USER
 			| DEFAULT
 			| DEFERRABLE
-			| DEFINE
 			| DESC
 			| DISTINCT
 			| DO
diff --git a/src/include/parser/kwlist.h b/src/include/parser/kwlist.h
index 7c60b9b44a8..89dc2a4b95a 100644
--- a/src/include/parser/kwlist.h
+++ b/src/include/parser/kwlist.h
@@ -129,7 +129,7 @@ PG_KEYWORD("default", DEFAULT, RESERVED_KEYWORD, BARE_LABEL)
 PG_KEYWORD("defaults", DEFAULTS, UNRESERVED_KEYWORD, BARE_LABEL)
 PG_KEYWORD("deferrable", DEFERRABLE, RESERVED_KEYWORD, BARE_LABEL)
 PG_KEYWORD("deferred", DEFERRED, UNRESERVED_KEYWORD, BARE_LABEL)
-PG_KEYWORD("define", DEFINE, RESERVED_KEYWORD, BARE_LABEL)
+PG_KEYWORD("define", DEFINE, UNRESERVED_KEYWORD, BARE_LABEL)
 PG_KEYWORD("definer", DEFINER, UNRESERVED_KEYWORD, BARE_LABEL)
 PG_KEYWORD("delete", DELETE_P, UNRESERVED_KEYWORD, BARE_LABEL)
 PG_KEYWORD("delimiter", DELIMITER, UNRESERVED_KEYWORD, BARE_LABEL)