diff --git a/src/include/utils/guc.h b/src/include/utils/guc.h
index 3f02030a62d..3c1f78bb992 100644
--- a/src/include/utils/guc.h
+++ b/src/include/utils/guc.h
@@ -102,7 +102,7 @@ typedef enum
  * will show as "default" in pg_settings.  If there is a specific reason not
  * to want that, use source == PGC_S_OVERRIDE.
  *
- * NB: see GucSource_Names in guc.c if you change this.
+ * NB: see GucSource_Names in guc_tables.c if you change this.
  */
 typedef enum
 {