1 files changed, 4 insertions, 0 deletions
diff --git a/tree.c b/tree.c
index 21137e1f..bf498a87 100644
--- a/tree.c
+++ b/tree.c
@@ -14,6 +14,10 @@
  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
 #include <assert.h>
 #include <stdio.h>
 #include <stdlib.h>