diff --git a/plugins/dos2unix/__init__.py b/plugins/dos2unix/__init__.py
index bae9358..e5b2d9c 100644
--- a/plugins/dos2unix/__init__.py
+++ b/plugins/dos2unix/__init__.py
@@ -6,6 +6,8 @@ class Filter():
         pass
 
     def file_data_filter(self,file_data):
+        if file_data['file_ctx'] == None:
+            return
         file_ctx = file_data['file_ctx']
         if not file_ctx.isbinary():
             file_data['data'] = file_data['data'].replace(b'\r\n', b'\n')
diff --git a/plugins/shell_filter_file_contents/__init__.py b/plugins/shell_filter_file_contents/__init__.py
index 84fd938..4030da0 100644
--- a/plugins/shell_filter_file_contents/__init__.py
+++ b/plugins/shell_filter_file_contents/__init__.py
@@ -15,6 +15,8 @@ class Filter:
         d = file_data['data']
         file_ctx = file_data['file_ctx']
         filename = file_data['filename']
+        if file_ctx == None:
+            return
         filter_cmd = self.filter_contents + [filename, node.hex(file_ctx.filenode()), '1' if file_ctx.isbinary() else '0']
         try:
             filter_proc = subprocess.Popen(filter_cmd, stdin=subprocess.PIPE, stdout=subprocess.PIPE)
diff --git a/t/file_data_filter.t b/t/file_data_filter.t
index a938e97..aa054c9 100755
--- a/t/file_data_filter.t
+++ b/t/file_data_filter.t
@@ -25,7 +25,9 @@ git_convert() {
 	cd "$2" &&
 	hg-fast-export.sh --repo "../$1" \
 			  -s --hgtags -n \
-			  --plugin ../../plugins/rename_file_test_plugin
+			  --plugin ../../plugins/rename_file_test_plugin \
+			  --plugin dos2unix \
+			  --plugin shell_filter_file_contents=../../plugins/id
 	)
 }
 
diff --git a/t/plugins/id b/t/plugins/id
new file mode 100755
index 0000000..2cebdbd
--- /dev/null
+++ b/t/plugins/id
@@ -0,0 +1,2 @@
+#!/bin/bash
+cat