diff --git a/test/regress.c b/test/regress.c
index 2a9d2507..0a426413 100644
--- a/test/regress.c
+++ b/test/regress.c
@@ -1534,7 +1534,7 @@ end:
 	}
 }
 
-int
+static int
 check_dummy_mem_ok(void *_mem)
 {
 	char *mem = _mem;