diff --git a/libc3/window/cairo/Makefile b/libc3/window/cairo/Makefile
index 8dc542f..f71c4aa 100644
--- a/libc3/window/cairo/Makefile
+++ b/libc3/window/cairo/Makefile
@@ -91,3 +91,4 @@ update_sources:
update_sources
include config.mk
+include sources.mk