diff --git a/src/racket/gc/mark_rts.c b/src/racket/gc/mark_rts.c
index 8e9209b516..ef60d8074f 100644
--- a/src/racket/gc/mark_rts.c
+++ b/src/racket/gc/mark_rts.c
@@ -369,7 +369,8 @@ ptr_t GC_approx_sp(void)
 #   ifdef _MSC_VER
 #     pragma warning(disable:4172)
 #   endif
-    return((ptr_t)(&dummy));
+	ptr_t addr = ((ptr_t)(&dummy));
+    return addr;
 #   ifdef _MSC_VER
 #     pragma warning(default:4172)
 #   endif