diff --git a/Makefile b/Makefile
index 4a75d0f..b62f6f0 100644
--- a/Makefile
+++ b/Makefile
@@ -75,6 +75,7 @@ $(SRC_PATH)/ncc/autoload_spl.php:
 		$(SRC_PATH)/ncc/CLI \
 		$(SRC_PATH)/ncc/Exceptions \
 		$(SRC_PATH)/ncc/Extensions \
+		$(SRC_PATH)/ncc/Interfaces \
 		$(SRC_PATH)/ncc/Managers \
 		$(SRC_PATH)/ncc/Objects \
 		$(SRC_PATH)/ncc/Runtime \