diff --git a/src/gprs/sgsn_cdr.c b/src/gprs/sgsn_cdr.c
index 55aa664..7380e74 100644
--- a/src/gprs/sgsn_cdr.c
+++ b/src/gprs/sgsn_cdr.c
@@ -164,6 +164,7 @@
 
 	memset(apni, 0, sizeof(apni));
 	memset(ggsn_addr, 0, sizeof(ggsn_addr));
+	memset(sgsn_addr, 0, sizeof(sgsn_addr));
 	memset(eua_addr, 0, sizeof(eua_addr));