diff --git a/ChangeLog b/ChangeLog
index 561445045e..3a2714a046 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,4 +1,6 @@
-Wed Oct 13 23:07:19 2010  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+Wed Oct 13 23:16:46 2010  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* tool/enc-unicode.rb: get rid of lots of warnings.
 
 	* iseq.c (insn_operand_intern, rb_iseq_disasm): fix format specifiers.
 
diff --git a/enc/unicode/name2ctype.h b/enc/unicode/name2ctype.h
index 2248b8f7cb..df6f02e826 100644
--- a/enc/unicode/name2ctype.h
+++ b/enc/unicode/name2ctype.h
@@ -34,6 +34,7 @@ error "gperf generated tables don't work with this execution character set. Plea
 #endif
 
 
+#define long size_t
 
 #ifdef USE_UNICODE_PROPERTIES
 #ifdef USE_UNICODE_PROPERTIES
diff --git a/enc/unicode/name2ctype.h.blt b/enc/unicode/name2ctype.h.blt
index 2248b8f7cb..df6f02e826 100644
--- a/enc/unicode/name2ctype.h.blt
+++ b/enc/unicode/name2ctype.h.blt
@@ -34,6 +34,7 @@ error "gperf generated tables don't work with this execution character set. Plea
 #endif
 
 
+#define long size_t
 
 #ifdef USE_UNICODE_PROPERTIES
 #ifdef USE_UNICODE_PROPERTIES
diff --git a/enc/unicode/name2ctype.kwd b/enc/unicode/name2ctype.kwd
index ff136177ca..f4341722fd 100644
--- a/enc/unicode/name2ctype.kwd
+++ b/enc/unicode/name2ctype.kwd
@@ -1,4 +1,5 @@
 %{
+#define long size_t
 
 #ifdef USE_UNICODE_PROPERTIES
 /* 'Any': - */
diff --git a/enc/unicode/name2ctype.src b/enc/unicode/name2ctype.src
index ff136177ca..f4341722fd 100644
--- a/enc/unicode/name2ctype.src
+++ b/enc/unicode/name2ctype.src
@@ -1,4 +1,5 @@
 %{
+#define long size_t
 
 #ifdef USE_UNICODE_PROPERTIES
 /* 'Any': - */
diff --git a/tool/enc-unicode.rb b/tool/enc-unicode.rb
index b7f5bb57e7..351d40ed84 100755
--- a/tool/enc-unicode.rb
+++ b/tool/enc-unicode.rb
@@ -205,6 +205,7 @@ end
 
 # Write Data
 puts '%{'
+puts '#define long size_t'
 props, data = parse_unicode_data(get_file('UnicodeData.txt'))
 print "\n#ifdef USE_UNICODE_PROPERTIES"
 props.each do |name|