diff --git a/sys/arm64/iommu/iommu_pmap.c b/sys/arm64/iommu/iommu_pmap.c
--- a/sys/arm64/iommu/iommu_pmap.c
+++ b/sys/arm64/iommu/iommu_pmap.c
@@ -47,6 +47,7 @@
 
 #include <vm/vm.h>
 #include <vm/vm_param.h>
+#include <sys/systm.h>
 #include <vm/vm_page.h>
 #include <vm/vm_map.h>
 #include <vm/vm_object.h>