diff --git a/src/charon/Makefile.am b/src/charon/Makefile.am
index 091311e41..99518b0dd 100644
--- a/src/charon/Makefile.am
+++ b/src/charon/Makefile.am
@@ -1,3 +1,4 @@
+SUBDIRS = . testing
 ipsec_PROGRAMS = charon
 
 charon_SOURCES = \