diff --git a/src/runtime/pprof/pprof.go b/src/runtime/pprof/pprof.go
index 74cdd15cfb..2fc567ef34 100644
--- a/src/runtime/pprof/pprof.go
+++ b/src/runtime/pprof/pprof.go
@@ -28,7 +28,7 @@
 //            if err != nil {
 //                log.Fatal("could not create CPU profile: ", err)
 //            }
-//            defer f.Close()
+//            defer f.Close() // error handling omitted for example
 //            if err := pprof.StartCPUProfile(f); err != nil {
 //                log.Fatal("could not start CPU profile: ", err)
 //            }
@@ -42,7 +42,7 @@
 //            if err != nil {
 //                log.Fatal("could not create memory profile: ", err)
 //            }
-//            defer f.Close()
+//            defer f.Close() // error handling omitted for example
 //            runtime.GC() // get up-to-date statistics
 //            if err := pprof.WriteHeapProfile(f); err != nil {
 //                log.Fatal("could not write memory profile: ", err)