diff --git a/contrib/fuzzystrmatch/dmetaphone.c b/contrib/fuzzystrmatch/dmetaphone.c
index 5001288bb6..c8f5f32fbb 100644
--- a/contrib/fuzzystrmatch/dmetaphone.c
+++ b/contrib/fuzzystrmatch/dmetaphone.c
@@ -195,7 +195,7 @@ dmetaphone_alt(PG_FUNCTION_ARGS)
  * in a case like this.
  */
 
-#define META_FREE(x)			/* pfree((x)) */
+#define META_FREE(x) ((void)true) /* pfree((x)) */
 #else							/* not defined DMETAPHONE_MAIN */
 
 /* use the standard malloc library when not running in PostgreSQL */