diff --git a/server/utils.h b/server/utils.h
index 54bc9d49..2cbd779c 100644
--- a/server/utils.h
+++ b/server/utils.h
@@ -52,9 +52,9 @@ static inline int test_bit(int index, uint32_t val)
 
 typedef int64_t red_time_t;
 
-#define NSEC_PER_SEC      1000000000LL
-#define NSEC_PER_MILLISEC 1000000
-#define NSEC_PER_MICROSEC 1000
+#define NSEC_PER_SEC      INT64_C(1000000000)
+#define NSEC_PER_MILLISEC INT64_C(1000000)
+#define NSEC_PER_MICROSEC INT64_C(1000)
 
 /* g_get_monotonic_time() does not have enough precision */
 static inline red_time_t spice_get_monotonic_time_ns(void)