diff --git a/channels/chan_sip.c b/channels/chan_sip.c
index a4c3001531..91de845e19 100755
--- a/channels/chan_sip.c
+++ b/channels/chan_sip.c
@@ -3824,7 +3824,7 @@ static void initreqprep(struct sip_request *req, struct sip_pvt *p, char *cmd, c
                 	x=1;
 
         	for (; x<strlen(p->username); x++) {
-                	if (!strchr(AST_DIGIT_ANY, p->username[x])) {
+                	if (!strchr(AST_DIGIT_ANYNUM, p->username[x])) {
                         	onlydigits = 0;
                         	break;
                 	}
diff --git a/include/asterisk/file.h b/include/asterisk/file.h
index 9edfcaa73d..30600bab5f 100755
--- a/include/asterisk/file.h
+++ b/include/asterisk/file.h
@@ -26,6 +26,7 @@ extern "C" {
 
 /*! Convenient for waiting */
 #define AST_DIGIT_ANY "0123456789#*ABCD"
+#define AST_DIGIT_ANYNUM "0123456789"
 
 #define SEEK_FORCECUR	10