diff --git a/ChangeLog b/ChangeLog
index 14ed636e35..6215197396 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Thu May 21 13:32:52 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* ext/-test-/printf/printf.c (uint_to_str): renamed to get rid of
+	  conflict on cygwin.  [ruby-core:68877] [Bug #11065]
+
 Thu May 21 13:28:03 2015  Koichi Sasada  <ko1@atdot.net>
 
 	* vm.c (vm_exec): check other events when RETURN is thrown.
diff --git a/ext/-test-/printf/printf.c b/ext/-test-/printf/printf.c
index 1ebe80411b..68e46d2173 100644
--- a/ext/-test-/printf/printf.c
+++ b/ext/-test-/printf/printf.c
@@ -28,7 +28,7 @@ printf_test_q(VALUE self, VALUE obj)
 }
 
 static char *
-utoa(char *p, char *e, unsigned int x)
+uint_to_str(char *p, char *e, unsigned int x)
 {
     char *e0 = e;
     if (e <= p) return p;
@@ -79,12 +79,12 @@ printf_test_call(int argc, VALUE *argv, VALUE self)
 	    *p++ = '0';
 	}
 	if (!NIL_P(v = rb_hash_aref(opt, ID2SYM(rb_intern("width"))))) {
-	    p = utoa(p, format + sizeof(format), NUM2UINT(v));
+	    p = uint_to_str(p, format + sizeof(format), NUM2UINT(v));
 	}
 	if (!NIL_P(v = rb_hash_aref(opt, ID2SYM(rb_intern("prec"))))) {
 	    *p++ = '.';
 	    if (FIXNUM_P(v))
-		p = utoa(p, format + sizeof(format), NUM2UINT(v));
+		p = uint_to_str(p, format + sizeof(format), NUM2UINT(v));
 	}
     }
     *p++ = cnv;
diff --git a/version.h b/version.h
index 730a11a370..00ef70eda9 100644
--- a/version.h
+++ b/version.h
@@ -1,6 +1,6 @@
 #define RUBY_VERSION "2.1.7"
 #define RUBY_RELEASE_DATE "2015-05-21"
-#define RUBY_PATCHLEVEL 350
+#define RUBY_PATCHLEVEL 351
 
 #define RUBY_RELEASE_YEAR 2015
 #define RUBY_RELEASE_MONTH 5