diff --git a/src/cmd/db/mkfile b/src/cmd/db/mkfile
index 65b87977..d73ecc85 100644
--- a/src/cmd/db/mkfile
+++ b/src/cmd/db/mkfile
@@ -22,5 +22,4 @@ SHORTLIB=mach bio 9
 
 <$PLAN9/src/mkone
 
-CFLAGS=$CFLAGS -I../libmach2