diff --git a/src/pkg/runtime/pprof/pprof_test.go b/src/pkg/runtime/pprof/pprof_test.go
index a9868ccb10..738e2c4ec4 100644
--- a/src/pkg/runtime/pprof/pprof_test.go
+++ b/src/pkg/runtime/pprof/pprof_test.go
@@ -47,6 +47,7 @@ func TestCPUProfileMultithreaded(t *testing.T) {
 		for i := 0; i < 2000; i++ {
 			crc32.ChecksumIEEE(buf)
 		}
+		<-c
 	})
 }