Index: main/features.c
===================================================================
--- main/features.c	(revision 320937)
+++ main/features.c	(working copy)
@@ -3731,7 +3731,7 @@
 					ast_log(LOG_DEBUG, "Passing DTMF through, since it is not a feature code\n");
 				}
 				ast_write(other, f);
-				sendingdtmfdigit = 1;
+				sendingdtmfdigit++;
 			} else {
 				/* If ast_opt_transmit_silence is set, then we need to make sure we are
 				 * transmitting something while we hold on to the DTMF waiting for a
@@ -3757,11 +3757,11 @@
 				featurecode = peer_featurecode;
 			}
 
-			if (sendingdtmfdigit == 1) {
+			if (sendingdtmfdigit) {
 				/* We let the BEGIN go through happily, so let's not bother with the END,
 				 * since we already know it's not something we bother with */
 				ast_write(other, f);
-				sendingdtmfdigit = 0;
+				sendingdtmfdigit--;
 			} else {
 				/*! append the event to featurecode. we rely on the string being zero-filled, and
 				 * not overflowing it.