diff --git a/src/runtime/pprof/pprof_rusage.go b/src/runtime/pprof/pprof_rusage.go
index 7df81eca23..984a32e79d 100644
--- a/src/runtime/pprof/pprof_rusage.go
+++ b/src/runtime/pprof/pprof_rusage.go
@@ -28,6 +28,6 @@ func addMaxRSS(w io.Writer) {
 	}
 
 	var rusage syscall.Rusage
-	syscall.Getrusage(0, &rusage)
+	syscall.Getrusage(syscall.RUSAGE_SELF, &rusage)
 	fmt.Fprintf(w, "# MaxRSS = %d\n", uintptr(rusage.Maxrss)*rssToBytes)
 }