diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index af9e9fd48f4..3b53eb27954 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,5 +1,8 @@
 2007-04-19  Janis Johnson  <janis187@us.ibm.com>
 
+	* ginclude/float.h: Check that __STDC_WANT_DEC_FP__ is defined,
+	not that it is 1.
+
 	* c-cppbuiltin.c (c_cpp_builtins): Remove definition of
 	__STDC_WANT_DEC_FP__.
 
diff --git a/gcc/ginclude/float.h b/gcc/ginclude/float.h
index 1e16e8884d7..23ce8f42c91 100644
--- a/gcc/ginclude/float.h
+++ b/gcc/ginclude/float.h
@@ -160,7 +160,7 @@ Boston, MA 02110-1301, USA.  */
 
 #endif /* C99 */
 
-#if __STDC_WANT_DEC_FP__ == 1
+#ifdef __STDC_WANT_DEC_FP__
 /* Draft Technical Report 24732, extension for decimal floating-point
    arithmetic: Characteristic of decimal floating types <float.h>.  */
 
@@ -236,6 +236,6 @@ Boston, MA 02110-1301, USA.  */
 #undef DECFLT_EVAL_METHOD
 #define DECFLT_EVAL_METHOD	__DECFLT_EVAL_METHOD__
 
-#endif /* __STDC_WANT_DEC_FP__ == 1 */
+#endif /* __STDC_WANT_DEC_FP__ */
 
 #endif /* _FLOAT_H___ */