diff --git a/src/beep.c b/src/beep.c
index 7d5f66f..b9950c4 100644
--- a/src/beep.c
+++ b/src/beep.c
@@ -216,7 +216,7 @@ int beep(double freq_hz, double duration_sec)
     unsigned int i,j;
     snd_pcm_sframes_t frames;
    
- int up_count = SAMPLE_RATE * msecs / 1000;
+ int up_count = (int)(SAMPLE_RATE * duration_sec);
  
  
     f1 = 0.02;