1 files changed, 1 insertions, 1 deletions

diff --git a/aclocal.m4 b/aclocal.m4
index d40f52f..76ed13b 100644
--- a/aclocal.m4
+++ b/aclocal.m4
@@ -1311,7 +1311,7 @@ KDE_MT_LIBS=
 if test "x$kde_use_qt_mt" = "xyes"; then
   KDE_CHECK_THREADING
   if test "x$kde_use_threading" = "xyes"; then
-    CPPFLAGS="$USE_THREADS -DQT_THREAD_SUPPORT $CPPFLAGS"
+    CPPFLAGS="$USE_THREADS -DTQT_THREAD_SUPPORT $CPPFLAGS"
     KDE_MT_LDFLAGS="$USE_THREADS"
     KDE_MT_LIBS="$LIBPTHREAD"
   else