--- a/ShortFloat.st	Tue Dec 03 19:09:58 2019 +0100
+++ b/ShortFloat.st	Tue Dec 03 19:21:04 2019 +0100
@@ -107,7 +107,7 @@
 
 # ifndef isnanf
 #  define isnanf(x)      \
-	(((unsigned int *)(&x))[0] & 0x7FC00000 == 0x7FC00000)
+	((((unsigned int *)(&x))[0] & 0x7FC00000) == 0x7FC00000)
 // old, invalid definition
 //        (((unsigned int *)(&x))[0] == 0xFFC00000)
 # endif