diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 0da13fd..4a9f376 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -105,7 +105,8 @@ 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)