diff --git a/examples/blocks/blocks/gamepadscene.go b/examples/blocks/blocks/gamepadscene.go
index 6dafd3e33..aedcd49aa 100644
--- a/examples/blocks/blocks/gamepadscene.go
+++ b/examples/blocks/blocks/gamepadscene.go
@@ -12,6 +12,8 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
+// +build example
+
 package blocks
 
 import (