diff --git a/sys/arm64/arm64/pmap.c b/sys/arm64/arm64/pmap.c
--- a/sys/arm64/arm64/pmap.c
+++ b/sys/arm64/arm64/pmap.c
@@ -4565,9 +4565,8 @@
 	register_t intr;
 
 	PMAP_LOCK_ASSERT(pmap, MA_OWNED);
-
-	if ((newpte & ATTR_SW_NO_PROMOTE) != 0)
-		panic("%s: Updating non-promote pte", __func__);
+	KASSERT((newpte & ATTR_SW_NO_PROMOTE) == 0,
+	    ("%s: Updating non-promote pte", __func__));
 
 	/*
 	 * Ensure we don't get switched out with the page table in an
@@ -4608,9 +4607,8 @@
 	register_t intr;
 
 	PMAP_LOCK_ASSERT(pmap, MA_OWNED);
-
-	if ((newpte & ATTR_SW_NO_PROMOTE) != 0)
-		panic("%s: Updating non-promote pte", __func__);
+	KASSERT((newpte & ATTR_SW_NO_PROMOTE) == 0,
+	    ("%s: Updating non-promote pte", __func__));
 
 	/*
 	 * Ensure we don't get switched out with the page table in an