diff --git a/CMakeLists.txt b/CMakeLists.txt
index 531b0591428891ebc8de11760270fc120ba95bd5..75aca2ef1c82bfc62de913db0a01f6dad2127222 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -54,7 +54,7 @@ find_package(event)
 find_package(Doxygen)
 
 INCLUDE(FindQt4)
-FIND_PACKAGE(Qt4 COMPONENTS QtCore QtNetwork)
+FIND_PACKAGE(Qt4 COMPONENTS QtCore QtNetwork REQUIRED)
 
 # ADD_DEFINITIONS(${SWIFTEN_CFLAGS})
 ADD_DEFINITIONS(-DSUPPORT_LEGACY_CAPS)
@@ -104,6 +104,7 @@ if (PROTOBUF_FOUND)
 	if(IRC_FOUND)
 		ADD_DEFINITIONS(-DIRC_SHARED)
 		message("IRC plugin        : yes")
+		include_directories(${QT_QTNETWORK_INCLUDE_DIR})
 		include_directories(${IRC_INCLUDE_DIR})
 		include(${QT_USE_FILE})
 	else()