diff --git a/container/intsets/popcnt_amd64.go b/container/intsets/popcnt_amd64.go
index 7297f31011..99ea813d28 100644
--- a/container/intsets/popcnt_amd64.go
+++ b/container/intsets/popcnt_amd64.go
@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build amd64,!appengine
+// +build amd64,!appengine,!gccgo
 
 package intsets
 
diff --git a/container/intsets/popcnt_amd64.s b/container/intsets/popcnt_amd64.s
index 6538b91d5e..05c3d6fb57 100644
--- a/container/intsets/popcnt_amd64.s
+++ b/container/intsets/popcnt_amd64.s
@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+// +build amd64,!appengine,!gccgo
+
 #include "textflag.h"
 
 // func havePOPCNT() bool
diff --git a/container/intsets/popcnt_generic.go b/container/intsets/popcnt_generic.go
index cf1305cfa1..682e2f53a4 100644
--- a/container/intsets/popcnt_generic.go
+++ b/container/intsets/popcnt_generic.go
@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build !amd64 appengine
+// +build !amd64 appengine gccgo
 
 package intsets