diff --git a/zebra/rt_netlink.c b/zebra/rt_netlink.c
index 5909131..15475e2 100644
--- a/zebra/rt_netlink.c
+++ b/zebra/rt_netlink.c
@@ -1368,7 +1368,7 @@
     char buf[NL_PKT_BUF_SIZE];
   } req;
 
-  memset (&req, 0, sizeof req);
+  memset (&req, 0, sizeof req - NL_PKT_BUF_SIZE);
 
   bytelen = (family == AF_INET ? 4 : 16);
 
@@ -1443,7 +1443,7 @@
     char buf[NL_PKT_BUF_SIZE];
   } req;
 
-  memset (&req, 0, sizeof req);
+  memset (&req, 0, sizeof req - NL_PKT_BUF_SIZE);
 
   bytelen = (family == AF_INET ? 4 : 16);
 
@@ -1903,7 +1903,7 @@
   } req;
 
   p = ifc->address;
-  memset (&req, 0, sizeof req);
+  memset (&req, 0, sizeof req - NL_PKT_BUF_SIZE);
 
   bytelen = (family == AF_INET ? 4 : 16);