diff --git a/tools/libs/light/Makefile b/tools/libs/light/Makefile
index d681269229..374be1cfab 100644
--- a/tools/libs/light/Makefile
+++ b/tools/libs/light/Makefile
@@ -209,6 +209,7 @@ _libxl_save_msgs_helper.h _libxl_save_msgs_callout.h: \
 
 $(XEN_INCLUDE)/libxl.h: $(XEN_INCLUDE)/_libxl_types.h
 $(XEN_INCLUDE)/libxl_json.h: $(XEN_INCLUDE)/_libxl_types_json.h
+libxl_internal.h: $(XEN_INCLUDE)/libxl.h $(XEN_INCLUDE)/libxl_json.h
 libxl_internal.h: _libxl_types_internal.h _libxl_types_private.h _libxl_types_internal_private.h
 libxl_internal_json.h: _libxl_types_internal_json.h