1 files changed, 1 insertions, 1 deletions
diff --git a/drawing.c b/drawing.c
index 5fb8a31..90f54f3 100644
--- a/drawing.c
+++ b/drawing.c
@@ -27,7 +27,7 @@
 #include <stdlib.h>
 #include <string.h>
 #include <assert.h>
-#include <math.h>
+#include <tgmath.h>
 
 #include "puzzles.h"