diff --git a/mozilla/netwerk/streamconv/Makefile.in b/mozilla/netwerk/streamconv/Makefile.in
index 89814b88b6b..687ffd7bab4 100644
--- a/mozilla/netwerk/streamconv/Makefile.in
+++ b/mozilla/netwerk/streamconv/Makefile.in
@@ -30,4 +30,10 @@ DIRS=          \
 	src    \
 	$(NULL)
 
+ifdef ENABLE_TESTS
+DIRS+=         \
+	test    \
+	$(NULL)
+endif
+
 include $(topsrcdir)/config/rules.mk