diff --git a/test/swift/Makefile.am b/test/swift/Makefile.am
index 20c2fe5..f81fba8 100644
--- a/test/swift/Makefile.am
+++ b/test/swift/Makefile.am
@@ -19,6 +19,9 @@
 
 SUBDIRS = CrossTests
 
+distdir:
+	$(MAKE) $(AM_MAKEFLAGS) distdir-am
+
 precross:
 	$(MAKE) -C CrossTests precross