diff --git a/sys/i386/ibcs2/ibcs2_ipc.c b/sys/i386/ibcs2/ibcs2_ipc.c
index f17719f21f0..aa588dae6d8 100644
--- a/sys/i386/ibcs2/ibcs2_ipc.c
+++ b/sys/i386/ibcs2/ibcs2_ipc.c
@@ -135,6 +135,8 @@ ibcs2_msgctl(struct thread *td, void *v)
 	struct msqid_ds bs;
 	int error;
 
+	memset(&is, 0, sizeof(is));
+
 	switch (uap->cmd) {
 	case IBCS2_IPC_STAT:
 		error = kern_msgctl(td, uap->msqid, IPC_STAT, &bs);
@@ -318,6 +320,8 @@ ibcs2_semctl(struct thread *td, void *v)
 	register_t rval;
 	int error;
 
+	memset(&is, 0, sizeof(is));
+
 	switch(uap->cmd) {
 	case IBCS2_IPC_STAT:
 		semun.buf = &bs;