diff --git a/ChangeLog b/ChangeLog
index 0ad962ff64..1c44a5c4ec 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Tue Feb 19 13:16:08 2002  Nobuyoshi Nakada  <nobu.nakada@nifty.ne.jp>
+
+	* io.c (rb_io_ungetc): don't fail pushed EOF back.
+
 Mon Feb 18 20:48:40 2002  Nobuyoshi Nakada  <nobu.nakada@nifty.ne.jp>
 
 	* pack.c (pack_pack): avoid infinite loop at comment.
diff --git a/io.c b/io.c
index 9f1550812a..2404b1faf5 100644
--- a/io.c
+++ b/io.c
@@ -1083,7 +1083,7 @@ rb_io_ungetc(io, c)
     GetOpenFile(io, fptr);
     rb_io_check_readable(fptr);
 
-    if (ungetc(cc, fptr->f) == EOF)
+    if (ungetc(cc, fptr->f) == EOF && cc != EOF)
 	rb_sys_fail(fptr->path);
     return Qnil;
 }
diff --git a/version.h b/version.h
index 6734f09a96..85014d14ba 100644
--- a/version.h
+++ b/version.h
@@ -1,4 +1,4 @@
 #define RUBY_VERSION "1.7.2"
-#define RUBY_RELEASE_DATE "2002-02-18"
+#define RUBY_RELEASE_DATE "2002-02-19"
 #define RUBY_VERSION_CODE 172
-#define RUBY_RELEASE_CODE 20020218
+#define RUBY_RELEASE_CODE 20020219