Index: channels/chan_iax2.c
===================================================================
RCS file: /usr/cvsroot/asterisk/channels/chan_iax2.c,v
retrieving revision 1.188.2.12
diff -u -4 -p -r1.188.2.12 chan_iax2.c
--- channels/chan_iax2.c	4 Jan 2005 19:02:16 -0000	1.188.2.12
+++ channels/chan_iax2.c	4 Feb 2005 15:49:31 -0000
@@ -2892,12 +2892,15 @@ static unsigned int calc_timestamp(struc
 				* predicted time.  Also, round ms to the
 				* next multiple of frame size (so our
 				* silent periods are multiples of
 				* frame size too) */
-				int diff = ms % (f->samples / 8);
-				if(diff)
-				    ms += f->samples/8 - diff;
-
+				int adj = f->samples / 8;
+				if (adj) {
+					int diff = ms % adj;
+					if(diff)
+						ms += adj - diff;
+				}
+				
 				p->nextpred = ms;
 				p->notsilenttx = 1;
 			}
 		} else {