diff --git a/sys/src/9/pc/mmu.c b/sys/src/9/pc/mmu.c
index edcf866db..c0b13674a 100644
--- a/sys/src/9/pc/mmu.c
+++ b/sys/src/9/pc/mmu.c
@@ -524,8 +524,7 @@ mmuwalk(ulong* pdb, ulong va, int level, int create)
 			panic("mmuwalk2: va %luX entry %luX", va, *table);
 		if(!(*table & PTEVALID)){
 			map = rampage();
-			if(map == nil)
-				panic("mmuwalk: page alloc failed");
+			memset(map, 0, BY2PG);
 			*table = PADDR(map)|PTEWRITE|PTEVALID;
 		}
 		table = KADDR(PPN(*table));
diff --git a/sys/src/9/pc64/mmu.c b/sys/src/9/pc64/mmu.c
index 78725b3e4..f7c8bb7e5 100644
--- a/sys/src/9/pc64/mmu.c
+++ b/sys/src/9/pc64/mmu.c
@@ -299,8 +299,6 @@ ptesplit(uintptr* table, uintptr va)
 	if(pte == nil || (*pte & PTESIZE) == 0 || (va & PGLSZ(1)-1) == 0)
 		return;
 	table = rampage();
-	if(table == nil)
-		panic("ptesplit: out of memory\n");
 	va &= -PGLSZ(1);
 	pa = *pte & ~PTESIZE;
 	for(off = 0; off < PGLSZ(1); off += PGLSZ(0))