diff --git a/kernel/common/file19.rb b/kernel/common/file19.rb
index 1f48da5cf7..982250097f 100644
--- a/kernel/common/file19.rb
+++ b/kernel/common/file19.rb
@@ -6,6 +6,7 @@ def self.path(obj)
   end
 
   def size
+    raise IOError, "closed stream" if closed?
     stat.size
   end
 
diff --git a/spec/tags/19/ruby/core/file/size_tags.txt b/spec/tags/19/ruby/core/file/size_tags.txt
deleted file mode 100644
index af7d44ecac..0000000000
--- a/spec/tags/19/ruby/core/file/size_tags.txt
+++ /dev/null
@@ -1 +0,0 @@
-fails:File#size raises an IOError on a closed file