diff --git a/core/definitions.mk b/core/definitions.mk
index 019d36b..1f2d011 100644
--- a/core/definitions.mk
+++ b/core/definitions.mk
@@ -37,6 +37,8 @@
 # sub-variables.
 ALL_MODULES:=
 
+ALL_MAKE_MODULE_INFO_JSON_MODULES:=
+
 # The relative paths of the non-module targets in the system.
 ALL_NON_MODULES:=
 NON_MODULES_WITHOUT_LICENSE_METADATA:=