diff --git a/csharp/generate_protos.sh b/csharp/generate_protos.sh
index 60bc281..e861f16 100755
--- a/csharp/generate_protos.sh
+++ b/csharp/generate_protos.sh
@@ -43,10 +43,12 @@
 rm src/google/protobuf/descriptor_proto_file.proto
 
 $PROTOC -Isrc --csharp_out=csharp/src/ProtocolBuffers.Test/TestProtos \
+    src/google/protobuf/map_unittest_proto3.proto \
     src/google/protobuf/unittest_proto3.proto \
     src/google/protobuf/unittest_import_proto3.proto \
     src/google/protobuf/unittest_import_public_proto3.proto
 
+
 $PROTOC -Icsharp/protos/extest --csharp_out=csharp/src/ProtocolBuffers.Test/TestProtos \
     csharp/protos/extest/unittest_issues.proto