diff --git a/src/backend/parser/parse_coerce.c b/src/backend/parser/parse_coerce.c
index b69d2bcc83e..b9058e9c76c 100644
--- a/src/backend/parser/parse_coerce.c
+++ b/src/backend/parser/parse_coerce.c
@@ -334,9 +334,11 @@ coerce_type(ParseState *pstate, Node *node,
 												  targetTypeMod, baseTypeMod,
 												  newcon, DatumGetCString(con->constvalue),
 												  ccontext, cformat, location);
-			if (result) /* runtimer error function returned */
+			if (result)
+			{
+				ReleaseSysCache(baseType);
 				return result;
-
+			}
 			/*
 			 * If the result is NULL, the newcon should be already updated properly.
 			 * Keep advancing the code.