diff --git a/dlls/winmm/waveform.c b/dlls/winmm/waveform.c
index e9ee0078d4c..cb0762c367d 100644
--- a/dlls/winmm/waveform.c
+++ b/dlls/winmm/waveform.c
@@ -1247,7 +1247,7 @@ static WAVEHDR *WOD_MarkDoneHeaders(WINMM_Device *device)
         return NULL;
     }
 
-    clock_frames = (clock_pos / (double)clock_freq) * device->samples_per_sec;
+    clock_frames = (clock_pos * device->samples_per_sec) / clock_freq;
 
     nloops = device->loop_counter;
     while(queue &&