diff --git a/dom/tests/mochitest/ajax/prototype/test/unit/fixtures/Makefile.in b/dom/tests/mochitest/ajax/prototype/test/unit/fixtures/Makefile.in
index 67534a1f02c..05d47686d74 100644
--- a/dom/tests/mochitest/ajax/prototype/test/unit/fixtures/Makefile.in
+++ b/dom/tests/mochitest/ajax/prototype/test/unit/fixtures/Makefile.in
@@ -45,6 +45,7 @@ include $(DEPTH)/config/autoconf.mk
 include $(topsrcdir)/config/rules.mk
 
 _TEST_FILES	= \
+		content.html \
 		empty.js \
 		hello.js \
 		logo.gif \