diff --git a/ChangeLog b/ChangeLog
index adfdf9a6f6..18bea96e0d 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Mon Jan 28 00:39:09 2008  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* parse.y (parser_set_encode): check if encoding is ASCII compatible.
+
 Sun Jan 27 23:33:35 2008  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* sprintf.c (rb_str_format): fix for left justify flag.
diff --git a/parse.y b/parse.y
index 6164ba46e1..19b8ba658c 100644
--- a/parse.y
+++ b/parse.y
@@ -5746,10 +5746,16 @@ static void
 parser_set_encode(struct parser_params *parser, const char *name)
 {
     int idx = rb_enc_find_index(name);
+    rb_encoding *enc;
+
     if (idx < 0) {
 	rb_raise(rb_eArgError, "unknown encoding name: %s", name);
     }
-    parser->enc = rb_enc_from_index(idx);
+    enc = rb_enc_from_index(idx);
+    if (!rb_enc_asciicompat(enc)) {
+	rb_raise(rb_eArgError, "%s is not ASCII compatible", rb_enc_name(enc));
+    }
+    parser->enc = enc;
 }
 
 #ifndef RIPPER
diff --git a/version.h b/version.h
index 66b74b191f..8f7a23cde3 100644
--- a/version.h
+++ b/version.h
@@ -1,7 +1,7 @@
 #define RUBY_VERSION "1.9.0"
-#define RUBY_RELEASE_DATE "2008-01-26"
+#define RUBY_RELEASE_DATE "2008-01-28"
 #define RUBY_VERSION_CODE 190
-#define RUBY_RELEASE_CODE 20080126
+#define RUBY_RELEASE_CODE 20080128
 #define RUBY_PATCHLEVEL 0
 
 #define RUBY_VERSION_MAJOR 1
@@ -9,7 +9,7 @@
 #define RUBY_VERSION_TEENY 0
 #define RUBY_RELEASE_YEAR 2008
 #define RUBY_RELEASE_MONTH 1
-#define RUBY_RELEASE_DAY 26
+#define RUBY_RELEASE_DAY 28
 
 #ifdef RUBY_EXTERN
 RUBY_EXTERN const char ruby_version[];