diff --git a/ChangeLog b/ChangeLog
index ba97e1a454..33c7a9b729 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+2010-10-28  Erich Ritz  <erichritz@gmail.com>
+
+	* math/math.h (isinf): Fix typo in comment.
+
 2010-11-01  Ulrich Drepper  <drepper@gmail.com>
 
 	* po/da.po: Update from translation team.
diff --git a/math/math.h b/math/math.h
index 4e65678b8d..aeb54d9ed8 100644
--- a/math/math.h
+++ b/math/math.h
@@ -261,7 +261,7 @@ enum
       ? __isnan (x) : __isnanl (x))
 # endif
 
-/* Return nonzero value is X is positive or negative infinity.  */
+/* Return nonzero value if X is positive or negative infinity.  */
 # ifdef __NO_LONG_DOUBLE_MATH
 #  define isinf(x) \
      (sizeof (x) == sizeof (float) ? __isinff (x) : __isinf (x))