diff --git a/src/google/protobuf/compiler/cpp/cpp_extension.h b/src/google/protobuf/compiler/cpp/cpp_extension.h
index d354c16a..1c1caf1f 100644
--- a/src/google/protobuf/compiler/cpp/cpp_extension.h
+++ b/src/google/protobuf/compiler/cpp/cpp_extension.h
@@ -57,7 +57,7 @@ namespace cpp {
 class ExtensionGenerator {
  public:
   // See generator.cc for the meaning of dllexport_decl.
-  explicit ExtensionGenerator(const FieldDescriptor* desycriptor,
+  explicit ExtensionGenerator(const FieldDescriptor* descriptor,
                               const Options& options);
   ~ExtensionGenerator();