diff --git a/newlib/ChangeLog b/newlib/ChangeLog
index 4318bff8a..835d63d24 100644
--- a/newlib/ChangeLog
+++ b/newlib/ChangeLog
@@ -1,3 +1,7 @@
+2014-02-04  Matthias Braun  <matze@braunis.de>
+
+	* libm/mathfp/sf_numtest.c: Fix NaN/Inf detection logic.
+
 2014-01-20  Corinna Vinschen  <vinschen@redhat.com>
 
 	* libc/include/setjmp.h (longjmp): Fix copy/paste error.
diff --git a/newlib/libm/mathfp/sf_numtest.c b/newlib/libm/mathfp/sf_numtest.c
index 675086c41..00bab3a9d 100644
--- a/newlib/libm/mathfp/sf_numtest.c
+++ b/newlib/libm/mathfp/sf_numtest.c
@@ -40,7 +40,7 @@ _DEFUN (numtestf, (float),
     }
 
   /* Check for not a number or infinity. */
-  if (exp == 0x7f8)
+  if (exp == 0xff)
     {
       if(wx & 0x7fffff)
         return (NAN);