diff --git a/testing/Makefile.am b/testing/Makefile.am
index 0ad9f17480..d7982f67eb 100644
--- a/testing/Makefile.am
+++ b/testing/Makefile.am
@@ -1,6 +1,6 @@
 EXTRA_DIST = do-tests make-testing ssh start-testing stop-testing \
-             testing.conf ssh_config config hosts images scripts tests \
-			 README
+			 testing.conf ssh_config config hosts images css scripts \
+			 tests README
 
 # exclude all files ignored by Git from the tarball
 dist-hook: