diff --git a/CMakeLists.txt b/CMakeLists.txt
index cefe72b..b80ebd1 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -5,7 +5,7 @@ CMAKE_MINIMUM_REQUIRED(VERSION 2.6 FATAL_ERROR)
 ########################################################
 
 # project name
-PROJECT( MarlinFastJet )
+PROJECT( MarlinFastJet LANGUAGES CXX )
 
 # project version
 SET( ${PROJECT_NAME}_VERSION_MAJOR 0 )