diff --git a/src/google/protobuf/compiler/js/js_generator.cc b/src/google/protobuf/compiler/js/js_generator.cc
index 7c63e58f65..2d86d1c866 100755
--- a/src/google/protobuf/compiler/js/js_generator.cc
+++ b/src/google/protobuf/compiler/js/js_generator.cc
@@ -193,6 +193,7 @@ string ModuleAlias(const string& filename) {
   string basename = StripProto(filename);
   StripString(&basename, "-", '$');
   StripString(&basename, "/", '_');
+  StripString(&basename, ".", '_');
   return basename + "_pb";
 }