diff --git a/src/runtime/mkduff.go b/src/runtime/mkduff.go
index 46890791e3..cf6b37f530 100644
--- a/src/runtime/mkduff.go
+++ b/src/runtime/mkduff.go
@@ -8,14 +8,14 @@
 // The compiler jumps to computed addresses within
 // the routine to zero chunks of memory.
 // Do not change duffzero without also
-// changing clearfat in cmd/?g/ggen.go.
+// changing the uses in cmd/compile/internal/*/*.go.
 
 // runtime·duffcopy is a Duff's device for copying memory.
 // The compiler jumps to computed addresses within
 // the routine to copy chunks of memory.
 // Source and destination must not overlap.
 // Do not change duffcopy without also
-// changing blockcopy in cmd/?g/cgen.go.
+// changing the uses in cmd/compile/internal/*/*.go.
 
 // See the zero* and copy* generators below
 // for architecture-specific comments.