diff --git a/main/callerid.c b/main/callerid.c
index dfb43c77b6..0ebee03e1a 100644
--- a/main/callerid.c
+++ b/main/callerid.c
@@ -660,7 +660,8 @@ int callerid_feed(struct callerid_state *cid, unsigned char *ubuf, int len, int
 						default:
 							ast_log(LOG_NOTICE, "Unknown IE %d\n", cid->rawdata[x-1]);
 						}
-						if(0 > cid->rawdata[x]){	/* Negative offset in the CID Spill */
+						res = cid->rawdata[x];
+						if (0 > res){	/* Negative offset in the CID Spill */
 							ast_log(LOG_NOTICE, "IE %d has bad field length of %d at offset %d\n", cid->rawdata[x-1], cid->rawdata[x], x);
 							/* Try again */
 							cid->sawflag = 0;