diff --git a/plugin/cpp/CMakeLists.txt b/plugin/cpp/CMakeLists.txt
index dde42f388092a58d2e115eb559fed67c0860bab8..544e2ec2d07a3b29356597ca969f99d1e43d0b06 100644
--- a/plugin/cpp/CMakeLists.txt
+++ b/plugin/cpp/CMakeLists.txt
@@ -2,10 +2,13 @@ cmake_minimum_required(VERSION 2.6)
 FILE(GLOB SRC *.cpp *.h)
 FILE(GLOB HEADERS ../include/transport/*.h)
 
+set(EXTRA_SOURCES ${CMAKE_CURRENT_BINARY_DIR}/../../src/memoryusage.cpp)
+set(EXTRA_SOURCES ${EXTRA_SOURCES} ${CMAKE_CURRENT_BINARY_DIR}/../../include/transport/protocol.pb.cc)
+
 if (NOT WIN32)
-	ADD_LIBRARY(transport-plugin SHARED ${HEADERS} ${SRC} ${PROTOBUF_SRC} ${PROTOBUF_HDRS} ../../src/memoryusage.cpp ${CMAKE_CURRENT_BINARY_DIR}/../../include/transport/protocol.pb.cc)
+	ADD_LIBRARY(transport-plugin SHARED ${HEADERS} ${SRC} ${PROTOBUF_SRC} ${PROTOBUF_HDRS} ${EXTRA_SOURCES})
 else()
-	ADD_LIBRARY(transport-plugin STATIC ${HEADERS} ${SRC} ${PROTOBUF_SRC} ${PROTOBUF_HDRS} ../../src/memoryusage.cpp ${CMAKE_CURRENT_BINARY_DIR}/../../include/transport/protocol.pb.cc)
+	ADD_LIBRARY(transport-plugin STATIC ${HEADERS} ${SRC} ${PROTOBUF_SRC} ${PROTOBUF_HDRS} ${EXTRA_SOURCES})
 endif()
 ADD_DEPENDENCIES(transport-plugin pb)
 SET_SOURCE_FILES_PROPERTIES(${CMAKE_CURRENT_BINARY_DIR}/../../include/transport/protocol.pb.cc PROPERTIES GENERATED 1)