diff --git a/compiler/cpp/Makefile.am b/compiler/cpp/Makefile.am
index 16514ca..05c9121 100644
--- a/compiler/cpp/Makefile.am
+++ b/compiler/cpp/Makefile.am
@@ -115,6 +115,7 @@
              README.md \
              CMakeLists.txt \
              test \
+             tests \
              $(WINDOWS_DIST)
 
 #clean-local: