1 files changed, 5 insertions, 2 deletions
diff --git a/src/google/protobuf/descriptor_database.h b/src/google/protobuf/descriptor_database.h
index f32b1db..c35e478 100644
--- a/src/google/protobuf/descriptor_database.h
+++ b/src/google/protobuf/descriptor_database.h
@@ -41,6 +41,7 @@
 #include <string>
 #include <utility>
 #include <vector>
+#include <google/protobuf/stubs/common.h>
 #include <google/protobuf/descriptor.h>
 
 namespace google {
@@ -95,11 +96,12 @@ class LIBPROTOBUF_EXPORT DescriptorDatabase {
   //
   // This method has a default implementation that always returns
   // false.
-  virtual bool FindAllExtensionNumbers(const string& extendee_type,
-                                       vector<int>* output) {
+  virtual bool FindAllExtensionNumbers(const string& /* extendee_type */,
+                                       vector<int>* /* output */) {
     return false;
   }
 
+
  private:
   GOOGLE_DISALLOW_EVIL_CONSTRUCTORS(DescriptorDatabase);
 };
@@ -355,6 +357,7 @@ class LIBPROTOBUF_EXPORT MergedDescriptorDatabase : public DescriptorDatabase {
   bool FindAllExtensionNumbers(const string& extendee_type,
                                vector<int>* output);
 
+
  private:
   vector<DescriptorDatabase*> sources_;
   GOOGLE_DISALLOW_EVIL_CONSTRUCTORS(MergedDescriptorDatabase);