diff --git a/CMakeLists.txt b/CMakeLists.txt
index 387053b..2eb5ca8 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -46,7 +46,7 @@ find_package(Mal) # see if mal is available, but it's not required
 add_definitions(
 	${QT_DEFINITIONS}
 	${KDE3_DEFINITIONS}
-	-DQT_THREAD_SUPPORT
+	-DTQT_THREAD_SUPPORT
 )
 
 STRING(COMPARE EQUAL "${CMAKE_BUILD_TYPE}" "debug" builddebug)
diff --git a/lib/Makefile.am b/lib/Makefile.am
index 94c5fe9..7864a38 100644
--- a/lib/Makefile.am
+++ b/lib/Makefile.am
@@ -52,7 +52,7 @@ check-local:
 	for i in $(srcdir)/*.h ; do \
 		( echo "#include <kdemacros.h>" ; echo "#include \"$$i\"" ; echo "int main(int argc,char **argv){return 0;}" ) > header-test.cc; \
 		echo "$$i" ; \
-		g++ $(all_includes) -I$(top_builddir) -DQT_THREAD_SUPPORT -c header-test.cc || echo "$$i" >> FAILED; \
+		g++ $(all_includes) -I$(top_builddir) -DTQT_THREAD_SUPPORT -c header-test.cc || echo "$$i" >> FAILED; \
 	done
 	test ! -e FAILED