diff --git a/sys/powerpc/aim/mmu_radix.c b/sys/powerpc/aim/mmu_radix.c
--- a/sys/powerpc/aim/mmu_radix.c
+++ b/sys/powerpc/aim/mmu_radix.c
@@ -1844,6 +1844,7 @@
 
 	bzero(kernel_pmap, sizeof(struct pmap));
 	PMAP_LOCK_INIT(kernel_pmap);
+	vm_radix_init(&kernel_pmap->pm_radix);
 
 	ptpages = allocpages(3);
 	l1phys = moea64_bootstrap_alloc(RADIX_PGD_SIZE, RADIX_PGD_SIZE);