diff --git a/CMakeLists.txt b/CMakeLists.txt
index 960bfaa0fe285b34152e5c2a0b64e225500249ca..3eecd79946558298df396dad6b469beabba8a6db 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -24,6 +24,9 @@ find_package(Swiften REQUIRED)
 set(Boost_DIR "${CMAKE_SOURCE_DIR}/cmake_modules")
 find_package(Boost COMPONENTS date_time system filesystem program_options regex thread signals REQUIRED)
 
+set(Protobuf_DIR "${CMAKE_SOURCE_DIR}/cmake_modules")
+find_package(Protobuf REQUIRED)
+
 find_package(Doxygen)
 
 message("Supported features")
@@ -37,6 +40,14 @@ else (SQLITE3_FOUND)
 	message("SQLite3      : no")
 endif (SQLITE3_FOUND)
 
+if (PROTOBUF_FOUND)
+	ADD_DEFINITIONS(-DWITH_PROTOBUF)
+	include_directories(${PROTOBUF_INCLUDE_DIRS})
+	message("Spectrum Java/Python network protocol : yes")
+else()
+	message("Spectrum Java/Python network protocol : no (install Google Protocol Buffers)")
+endif()
+
 if(CMAKE_BUILD_TYPE MATCHES Debug)
 	ADD_DEFINITIONS(-ggdb)
 	ADD_DEFINITIONS(-DDEBUG)