--- gforth/prim	2009/01/29 19:51:28	1.239
+++ gforth/prim	2009/04/20 19:11:11	1.240
@@ -2150,6 +2150,10 @@ int flag;
 int decpt;
 sig=ecvt(r, u, &decpt, &flag);
 n=(r==0. ? 1 : decpt);
+#ifdef DARWIN
+// workaround Mac OS X bug in ecvt
+flag=signbit(r);
+#endif
 f1=FLAG(flag!=0);
 f2=FLAG(isdigit((unsigned)(sig[0]))!=0);
 siglen=strlen((char *)sig);