diff --git a/src/test/regress/pg_regress.c b/src/test/regress/pg_regress.c
index e6f71c7582..db8427dd9b 100644
--- a/src/test/regress/pg_regress.c
+++ b/src/test/regress/pg_regress.c
@@ -774,7 +774,7 @@ fmtHba(const char *raw)
 	const char *rp;
 	char	   *wp;
 
-	wp = ret = realloc(ret, 3 + strlen(raw) * 2);
+	wp = ret = pg_realloc(ret, 3 + strlen(raw) * 2);
 
 	*wp++ = '"';
 	for (rp = raw; *rp; rp++)