diff --git a/libfreefare/freefare.c b/libfreefare/freefare.c
index d2d3b63..8ee79dd 100644
--- a/libfreefare/freefare.c
+++ b/libfreefare/freefare.c
@@ -15,6 +15,8 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>
  */
 
+#include "config.h"
+
 #include <stdlib.h>
 #include <string.h>