1 files changed, 1 insertions, 1 deletions
diff --git a/flood.c b/flood.c
index 0ed8f06..da2317a 100644
--- a/flood.c
+++ b/flood.c
@@ -32,7 +32,7 @@
 #include <assert.h>
 #include <ctype.h>
 #include <limits.h>
-#include <math.h>
+#include <tgmath.h>
 
 #include "puzzles.h"