1 files changed, 5 insertions, 1 deletions
diff --git a/rect.c b/rect.c
index 40bc846..bc7e179 100644
--- a/rect.c
+++ b/rect.c
@@ -26,7 +26,11 @@
 #include <string.h>
 #include <assert.h>
 #include <ctype.h>
-#include <tgmath.h>
+#ifdef NO_TGMATH_H
+#  include <math.h>
+#else
+#  include <tgmath.h>
+#endif
 
 #include "puzzles.h"