1 files changed, 1 insertions, 0 deletions

diff --git a/genesis.c b/genesis.c
index 2598e95..8d45e4d 100644
--- a/genesis.c
+++ b/genesis.c
@@ -6,6 +6,7 @@
 #include "genesis.h"
 #include "blastem.h"
 #include <stdlib.h>
+#include <ctype.h>
 #include "render.h"
 #include "gst.h"
 #include "util.h"