1 files changed, 1 insertions, 0 deletions

diff --git a/tools/grail-gesture.c b/tools/grail-gesture.c
index 614bf1a..368150e 100644
--- a/tools/grail-gesture.c
+++ b/tools/grail-gesture.c
@@ -27,6 +27,7 @@
 #include <stdio.h>
 #include <unistd.h>
 #include <fcntl.h>
+#include <stdlib.h>
 
 static grail_mask_t flag_mask[DIM_GRAIL_TYPE_BYTES];