diff --git a/sys/src/9/pc/mtrr.c b/sys/src/9/pc/mtrr.c
index 4b1558bfe..8a4c4565a 100644
--- a/sys/src/9/pc/mtrr.c
+++ b/sys/src/9/pc/mtrr.c
@@ -292,7 +292,7 @@ mtrr0(uvlong base, uvlong size, char *tstr)
 	slot = -1;
 	for(i = 0; i < vcnt; i++){
 		mok = mtrrdec(&mtrreg[i], &mp, &msize, &mtype);
-		if(slot == -1 && (!mok || mtype == (def & Deftype)))
+		if(slot == -1 && !mok)
 			slot = i;	/* good, but look further for exact match */
 		if(mok && mp == base && msize == size){
 			slot = i;