diff --git a/gtests/net/packetdrill/packet_socket_linux.c b/gtests/net/packetdrill/packet_socket_linux.c
index d8ec4d76f814242a27d4516451159ffae29f0b65..2e098b45dbaed5a92fe90494f7127f3237921168 100644
--- a/gtests/net/packetdrill/packet_socket_linux.c
+++ b/gtests/net/packetdrill/packet_socket_linux.c
@@ -173,7 +173,7 @@ void packet_socket_set_filter(struct packet_socket *psock,
 			       ((u32)client_ether[4] << 8)  |
 			       ((u32)client_ether[5]));
 	bpfcode.filter[3].k = (((u32)client_ether[0] << 8)  |
-			       ((u32(client_ether[1]));
+			       ((u32)client_ether[1]));
 
 	if (debug_logging) {
 		int i;