1 files changed, 1 insertions, 0 deletions
diff --git a/src/background.c b/src/background.c
index 03730e8..fc3b1ba 100644
--- a/src/background.c
+++ b/src/background.c
@@ -1,6 +1,7 @@
 #include "lzy.h"
 #include "cfg.h"
 #include "rotrect.h"
+#include <math.h>
 
 long tick = 0;