diff --git a/CMakeLists.txt b/CMakeLists.txt
index 1a1bd313d89315e9f78cd78d6b87b6760cb0fe29..c86d67868fa0a48af8ae56c75dbf14bb6740890c 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -68,7 +68,8 @@ endif()
 
 # basic environment
 include_directories(${Boost_INCLUDE_DIRS}
-                    ${OST_INCLUDE_DIR})
+                    ${OST_INCLUDE_DIR}
+                    ${QMEAN_INCLUDE_DIR})
 
 set(FILES_TO_BE_REMOVED ${PROJECT_BINARY_DIR}/stage)
 set_directory_properties(PROPERTIES ADDITIONAL_MAKE_CLEAN_FILES