diff --git a/foo.cc b/foo.cc
index 0b2e459245..d12a1b2838 100644
--- a/foo.cc
+++ b/foo.cc
@@ -1,4 +1,6 @@
+namespace {
 int main () {
 	int i;
 	return 2 + 24 -15 ;
 }
+}