diff --git a/ChangeLog b/ChangeLog
index 0d57814ddf..b1c62526fa 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Tue Jan 26 21:52:16 2016  Joseph Tibbertsma  <josephtibbertsma@gmail.com>
+
+	* gc.c (RVALUE_PAGE_WB_UNPROTECTED): fix a typo of argument name.
+	  [Fix GH-1221]
+
 Mon Jan 18 00:34:41 2016  Koichi Sasada  <ko1@atdot.net>
 
 	* vm_insnhelper.c (vm_call_method): should not set fastpath
diff --git a/gc.c b/gc.c
index 295d24d2f3..5ebb9376d9 100644
--- a/gc.c
+++ b/gc.c
@@ -930,7 +930,7 @@ tick(void)
 #define RVALUE_LONG_LIVED_BITMAP(obj)     MARKED_IN_BITMAP(GET_HEAP_LONG_LIVED_BITS(obj), (obj))
 #define RVALUE_MARKING_BITMAP(obj)        MARKED_IN_BITMAP(GET_HEAP_MARKING_BITS(obj), (obj))
 
-#define RVALUE_PAGE_WB_UNPROTECTED(apge, obj) MARKED_IN_BITMAP((page)->wb_unprotected_bits, (obj))
+#define RVALUE_PAGE_WB_UNPROTECTED(page, obj) MARKED_IN_BITMAP((page)->wb_unprotected_bits, (obj))
 #define RVALUE_PAGE_LONG_LIVED(page, obj)     MARKED_IN_BITMAP((page)->long_lived_bits, (obj))
 #define RVALUE_PAGE_MARKING(page, obj)        MARKED_IN_BITMAP((page)->marking_bits, (obj))
 
diff --git a/version.h b/version.h
index 3b9822ce66..38fed768a5 100644
--- a/version.h
+++ b/version.h
@@ -1,10 +1,10 @@
 #define RUBY_VERSION "2.2.5"
-#define RUBY_RELEASE_DATE "2016-01-18"
-#define RUBY_PATCHLEVEL 236
+#define RUBY_RELEASE_DATE "2016-01-26"
+#define RUBY_PATCHLEVEL 237
 
 #define RUBY_RELEASE_YEAR 2016
 #define RUBY_RELEASE_MONTH 1
-#define RUBY_RELEASE_DAY 18
+#define RUBY_RELEASE_DAY 26
 
 #include "ruby/version.h"