diff --git a/include/ChangeLog b/include/ChangeLog
index 331aef1e9..9302e2986 100644
--- a/include/ChangeLog
+++ b/include/ChangeLog
@@ -1,8 +1,12 @@
+2003-09-22  Andrew Cagney  <cagney@redhat.com>
+
+	* floatformat.h (struct floatformat): Add field "is_valid".
+
 2003-09-15  Andrew Cagney  <cagney@redhat.com>
 
 	* floatformat.h (floatformat_to_double): Make input buffer constant.
 	(floatformat_from_double, floatformat_is_valid): Ditto.
-	
+
 2003-09-15  Andrew Cagney  <cagney@redhat.com>
 
 	* floatformat.h (struct floatformat): Make "exp_bias" signed.
diff --git a/include/floatformat.h b/include/floatformat.h
index 3d0fd7a87..a8244ada5 100644
--- a/include/floatformat.h
+++ b/include/floatformat.h
@@ -80,6 +80,9 @@ struct floatformat
 
   /* Internal name for debugging. */
   const char *name;
+
+  /* Validator method.  */
+  int (*is_valid) PARAMS ((const struct floatformat *fmt, const char *from));
 };
 
 /* floatformats for IEEE single and double, big and little endian.  */