diff --git a/test/test-hrtime.c b/test/test-hrtime.c
index 18f89907..e7309804 100644
--- a/test/test-hrtime.c
+++ b/test/test-hrtime.c
@@ -24,11 +24,13 @@
 
 
 TEST_IMPL(hrtime) {
-  uint64_t a = uv_get_hrtime();
-  uv_sleep(1);
-  uint64_t b = uv_get_hrtime();
+  uint64_t a, b, diff;
 
-  uint64_t diff = b - a;
+  a = uv_get_hrtime();
+  uv_sleep(1);
+  b = uv_get_hrtime();
+
+  diff = b - a;
 
   printf("diff = %llu\n", diff);
   ASSERT(b - a >= NANOSEC / MILLISEC);