diff --git a/src/Makefile b/src/Makefile
index f8cee8a2..aeedf4f2 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -142,7 +142,7 @@ SRCDIRS		+= drivers/nvs
 SRCDIRS		+= drivers/bitbash
 SRCDIRS		+= interface/pxe
 SRCDIRS		+= tests
-SRCDIRS		+= crypto crypto/axtls
+SRCDIRS		+= crypto crypto/axtls crypto/matrixssl
 SRCDIRS		+= hci hci/commands hci/tui
 SRCDIRS		+= hci/mucurses hci/mucurses/widgets
 SRCDIRS		+= usr