diff --git a/ChangeLog b/ChangeLog
index 61d384a436..161ffaf356 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Sat Nov  7 03:32:27 2015  Koichi Sasada  <ko1@atdot.net>
+
+	* include/ruby/ruby.h (RSTRUCT_PTR): need a close parenthese.
+
 Sat Nov  7 01:32:06 2015  Naohisa Goto  <ngotogenome@gmail.com>
 
 	* dir.c (dir_fileno, dirfd): support of Dir#fileno on Solaris 10.
diff --git a/include/ruby/ruby.h b/include/ruby/ruby.h
index f778298d62..e7f2f0d990 100644
--- a/include/ruby/ruby.h
+++ b/include/ruby/ruby.h
@@ -1228,7 +1228,7 @@ struct RStruct {
 #define RSTRUCT_LEN(st) rb_struct_len(st)
 #define RSTRUCT_LENINT(st) rb_long2int(RSTRUCT_LEN(st))
 #define RSTRUCT_CONST_PTR(st) rb_struct_const_ptr(st)
-#define RSTRUCT_PTR(st) ((VALUE *)RSTRUCT_CONST_PTR(RB_OBJ_WB_UNPROTECT_FOR(STRUCT, st))
+#define RSTRUCT_PTR(st) ((VALUE *)RSTRUCT_CONST_PTR(RB_OBJ_WB_UNPROTECT_FOR(STRUCT, st)))
 
 #define RSTRUCT_SET(st, idx, v) RB_OBJ_WRITE(st, &RSTRUCT_CONST_PTR(st)[idx], (v))
 #define RSTRUCT_GET(st, idx)    (RSTRUCT_CONST_PTR(st)[idx])