diff --git a/ConfigureChecks.cmake b/ConfigureChecks.cmake
index ad02711e..c6065ac4 100644
--- a/ConfigureChecks.cmake
+++ b/ConfigureChecks.cmake
@@ -157,7 +157,7 @@ if( WITH_KONQSIDEBAR )
   set( CMAKE_REQUIRED_DEFINITIONS ${TQT_CFLAGS_OTHER} )
   set( CMAKE_REQUIRED_INCLUDES ${TDE_INCLUDE_DIR};${TQT_INCLUDE_DIRS};${CMAKE_INCLUDE_PATH} )
   set( CMAKE_REQUIRED_FLAGS "-include tqt.h" )
-  set( CMAKE_REQUIRED_LIBRARIES -L${QT_LIBRARY_DIRS} ${QT_LIBRARIES} )
+  set( CMAKE_REQUIRED_LIBRARIES -L${TQT_LIBRARY_DIRS} ${TQT_LIBRARIES} )
   check_cxx_source_compiles("
     #include <konqsidebarplugin.h>
     int main(int, char**) { return 0; } "