diff --git a/lib/kwmf/qwmf.cc b/lib/kwmf/qwmf.cc
index aabe40211..8b6572aee 100644
--- a/lib/kwmf/qwmf.cc
+++ b/lib/kwmf/qwmf.cc
@@ -17,6 +17,8 @@
  * Boston, MA 02110-1301, USA.
  */
 
+#include "config.h"
+
 #include <math.h>
 #include <assert.h>
 #include <tqfileinfo.h>