1 files changed, 2 insertions, 0 deletions
diff --git a/src/google/protobuf/compiler/javanano/javanano_helpers.h b/src/google/protobuf/compiler/javanano/javanano_helpers.h
index 5d3532b4..b4fee649 100644
--- a/src/google/protobuf/compiler/javanano/javanano_helpers.h
+++ b/src/google/protobuf/compiler/javanano/javanano_helpers.h
@@ -187,6 +187,8 @@ inline bool IsMapEntry(const Descriptor* descriptor) {
       descriptor->file()->syntax() == FileDescriptor::SYNTAX_PROTO3;
 }
 
+bool HasMapField(const Descriptor* descriptor);
+
 }  // namespace javanano
 }  // namespace compiler
 }  // namespace protobuf