1 files changed, 5 insertions, 1 deletions
diff --git a/tents.c b/tents.c
index 47a0d11..86b5245 100644
--- a/tents.c
+++ b/tents.c
@@ -33,7 +33,11 @@
 #include <assert.h>
 #include <ctype.h>
 #include <limits.h>
-#include <tgmath.h>
+#ifdef NO_TGMATH_H
+#  include <math.h>
+#else
+#  include <tgmath.h>
+#endif
 
 #include "puzzles.h"
 #include "matching.h"