diff --git a/sys/mips/rmi/dev/nlge/if_nlge.c b/sys/mips/rmi/dev/nlge/if_nlge.c
index 82092a955fd..d6c16a50cd9 100644
--- a/sys/mips/rmi/dev/nlge/if_nlge.c
+++ b/sys/mips/rmi/dev/nlge/if_nlge.c
@@ -1953,7 +1953,10 @@ send_fmn_msg_tx(struct nlge_softc *sc, struct msgrng_msg *msg,
     uint32_t n_entries)
 {
 	uint32_t msgrng_flags;
-	int i = 0, ret;
+	int ret;
+#ifdef INVARIANTS
+	int i = 0;
+#endif
 
 	do {
 		msgrng_flags = msgrng_access_enable();
diff --git a/sys/mips/rmi/dev/xlr/rge.c b/sys/mips/rmi/dev/xlr/rge.c
index 924031a4c5e..661c7895b57 100644
--- a/sys/mips/rmi/dev/xlr/rge.c
+++ b/sys/mips/rmi/dev/xlr/rge.c
@@ -713,8 +713,11 @@ xlr_mac_send_fr(struct driver_data *priv,
 {
 	struct msgrng_msg msg;
 	int stid = priv->rfrbucket;
-	int i = 0, code, ret;
+	int code, ret;
 	uint32_t msgrng_flags;
+#ifdef INVARIANTS
+	int i = 0;
+#endif
 
 	mac_make_desc_rfr(&msg, addr);
 
diff --git a/sys/mips/rmi/msgring.h b/sys/mips/rmi/msgring.h
index d524892d73c..6e61b50d8d9 100644
--- a/sys/mips/rmi/msgring.h
+++ b/sys/mips/rmi/msgring.h
@@ -306,7 +306,9 @@ message_send(unsigned int size, unsigned int code,
 {
 	unsigned int dest = 0;
 	unsigned long long status = 0;
+#ifdef INVARIANTS
 	int i = 0;
+#endif
 
 	msgrng_load_tx_msg0(msg->msg0);
 	msgrng_load_tx_msg1(msg->msg1);