diff --git a/src/backend/nodes/readfuncs.c b/src/backend/nodes/readfuncs.c
index 45659818e21b84eb9a3bd37b08eefc6cc416bada..491d3e08edcc0a6a7d0ef52ac50906db99d8ba73 100644
--- a/src/backend/nodes/readfuncs.c
+++ b/src/backend/nodes/readfuncs.c
@@ -2229,7 +2229,7 @@ _readExtensibleNode(void)
 
 	READ_TEMP_LOCALS();
 
-	token = pg_strtok(&length); /* skip: extnodename */
+	token = pg_strtok(&length); /* skip :extnodename */
 	token = pg_strtok(&length); /* get extnodename */
 
 	extnodename = nullable_string(token, length);