diff --git a/trunk/src/CMakeLists.txt b/trunk/src/CMakeLists.txt
index 9ef043d..ecbced9 100644
--- a/trunk/src/CMakeLists.txt
+++ b/trunk/src/CMakeLists.txt
@@ -120,7 +120,8 @@ ENDIF(OPENEXR_FOUND)
 FIND_PACKAGE(Qt4)
 
 # Threads
-FIND_PACKAGE(Threads)
+FIND_PACKAGE(Threads REQUIRED)
+MESSAGE(STATUS "Use thread library: ${CMAKE_THREAD_LIBS_INIT}")
 
 # configuration file
 INCLUDE(CheckIncludeFiles)