diff --git a/src/core/core_timing.h b/src/core/core_timing.h
index 64f5b06d9435dab6a27cf1b2ba5c018a45618342..3d8a7d0c0160e9bfd18b47e20c7b371614f43b9d 100644
--- a/src/core/core_timing.h
+++ b/src/core/core_timing.h
@@ -26,7 +26,7 @@
 extern int g_clock_rate_arm11;
 
 inline s64 msToCycles(int ms) {
-    return g_clock_rate_arm11 / 1000 * ms;
+    return (s64)g_clock_rate_arm11 / 1000 * ms;
 }
 
 inline s64 msToCycles(float ms) {