diff --git a/sys/amd64/amd64/pmap.c b/sys/amd64/amd64/pmap.c
index c2debf7117eb..4bdf38226e46 100644
--- a/sys/amd64/amd64/pmap.c
+++ b/sys/amd64/amd64/pmap.c
@@ -1481,6 +1481,7 @@ pmap_qremove(vm_offset_t sva, int count)
 
 	va = sva;
 	while (count-- > 0) {
+		KASSERT(va >= VM_MIN_KERNEL_ADDRESS, ("usermode va %lx", va));
 		pmap_kremove(va);
 		va += PAGE_SIZE;
 	}