diff --git a/src/runtime/mgc.go b/src/runtime/mgc.go
index 2bbe097d0e..01f02f26bd 100644
--- a/src/runtime/mgc.go
+++ b/src/runtime/mgc.go
@@ -1390,7 +1390,7 @@ func gcinit() {
 	memstats.next_gc = heapminimum
 }
 
-// Called from malloc.go using onM, stopping and starting the world handled in caller.
+// Called from malloc.go using systemstack, stopping and starting the world handled in caller.
 //go:nowritebarrier
 func gc_m(start_time int64, eagersweep bool) {
 	_g_ := getg()
@@ -1419,7 +1419,7 @@ func clearCheckmarks() {
 	}
 }
 
-// Called from malloc.go using onM.
+// Called from malloc.go using systemstack.
 // The world is stopped. Rerun the scan and mark phases
 // using the bitMarkedCheck bit instead of the
 // bitMarked bit. If the marking encounters an