diff --git a/src/i_video.c b/src/i_video.c
index 886a10b0..8e448bb2 100644
--- a/src/i_video.c
+++ b/src/i_video.c
@@ -749,7 +749,7 @@ void I_FinishUpdate(void)
         // Update FPS counter every second
         if (time >= 1000000)
         {
-            fps = (frame_counter * 1000000) / time;
+            fps = ((uint64_t)frame_counter * 1000000) / time;
             frame_counter = 0;
             last_time = frametime_start;
         }