diff --git a/src/runtime/mprof.go b/src/runtime/mprof.go
index fc73bbfbe1..3efa375d6a 100644
--- a/src/runtime/mprof.go
+++ b/src/runtime/mprof.go
@@ -506,9 +506,7 @@ func ThreadCreateProfile(p []StackRecord) (n int, ok bool) {
 		ok = true
 		i := 0
 		for mp := first; mp != nil; mp = mp.alllink {
-			for s := range mp.createstack {
-				p[i].Stack0[s] = uintptr(mp.createstack[s])
-			}
+			p[i].Stack0 = mp.createstack
 			i++
 		}
 	}