diff --git a/afsk/main.c b/afsk/main.c
index e758bfab..49685823 100644
--- a/afsk/main.c
+++ b/afsk/main.c
@@ -422,7 +422,7 @@ if (vB4)
 
 //   samplePeriod = ((float)((syncBits + 10 * (headerLen + rsFrames * (rsFrameLen + parityLen))))/(float)bitRate) * 1000 - 1800;
     samplePeriod = 3000;
-    sleepTime = 3;
+    sleepTime = 3.0;
 
     printf("\n BPSK Mode, bufLen: %d,  %d bits per frame, %d bits per second, %d seconds per frame %d ms sample period\n", 
 	   bufLen, bufLen/(samples * frameCnt), bitRate, bufLen/(samples * frameCnt * bitRate), samplePeriod);