1 files changed, 1 insertions, 0 deletions

diff --git a/ui-tree.c b/ui-tree.c
index 2dbe89e..c8d24f6 100644
--- a/ui-tree.c
+++ b/ui-tree.c
@@ -6,6 +6,7 @@
  *   (see COPYING for full license text)
  */
 
+#include <ctype.h>
 #include "cgit.h"
 #include "ui-tree.h"
 #include "html.h"