diff --git a/ChangeLog b/ChangeLog
index 284aa3be68..ef5d5d5599 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+Tue Nov 27 22:03:09 2012  Akinori MUSHA  <knu@iDaemons.org>
+
+	* string.c (rb_str_enumerate_chars, rb_str_enumerate_codepoints)
+	  (rb_str_enumerate_lines): Dummy initialization of ary has been
+	  replaced with UNINITIALIZED_VAR().
+
 Tue Nov 27 21:29:00 2012  Kenta Murata  <mrkn@mrkn.jp>
 
 	* bignum.c (bigdivrem): optimize the way to retry calculation of
diff --git a/string.c b/string.c
index 73afd06e8d..0c30ee4bc2 100644
--- a/string.c
+++ b/string.c
@@ -6126,7 +6126,6 @@ rb_str_enumerate_lines(int argc, VALUE *argv, VALUE str, int wantarray)
 #else
 	    rb_warning("passing a block to String#lines is deprecated");
 	    wantarray = 0;
-	    ary = 0;
 #endif
 	}
     }
@@ -6406,7 +6405,6 @@ rb_str_enumerate_chars(VALUE str, int wantarray)
 #else
 	    rb_warning("passing a block to String#chars is deprecated");
 	    wantarray = 0;
-	    ary = 0;
 #endif
 	}
     }
@@ -6507,7 +6505,6 @@ rb_str_enumerate_codepoints(VALUE str, int wantarray)
 #else
 	    rb_warning("passing a block to String#codepoints is deprecated");
 	    wantarray = 0;
-	    ary = 0;
 #endif
 	}
     }