diff --git a/src/backend/utils/misc/guc.c b/src/backend/utils/misc/guc.c
index a043d529ef..b0947a4cf1 100644
--- a/src/backend/utils/misc/guc.c
+++ b/src/backend/utils/misc/guc.c
@@ -1289,8 +1289,8 @@ find_option(const char *name, bool create_placeholders, bool skip_errors,
 static int
 guc_var_compare(const void *a, const void *b)
 {
-    const char *namea = **(const char ** const *) a;
-    const char *nameb = **(const char ** const *) b;
+    const char *namea = **(const char **const *) a;
+    const char *nameb = **(const char **const *) b;

     return guc_name_compare(namea, nameb);
 }