--- a/Float.st	Tue Dec 03 19:52:14 2019 +0100
+++ b/Float.st	Tue Dec 03 21:37:27 2019 +0100
@@ -198,6 +198,13 @@
 # endif
 #endif
 
+#ifndef isfinitef
+# define isfinitef(x) isfinite(x)
+#endif
+// #ifndef isnanf
+// # define isnanf(x) isnan(x)
+// #endif
+
 %}
 ! !