diff --git a/fsgen/filesystem_creator.go b/fsgen/filesystem_creator.go
index f00e491..29d5e79 100644
--- a/fsgen/filesystem_creator.go
+++ b/fsgen/filesystem_creator.go
@@ -505,6 +505,7 @@
 		}
 		fsProps.Security_patch = proptools.StringPtr(ctx.Config().PlatformSecurityPatch())
 		fsProps.Stem = proptools.StringPtr("system_ext.img")
+		fsProps.Gen_aconfig_flags_pb = proptools.BoolPtr(true)
 	case "product":
 		fsProps.Gen_aconfig_flags_pb = proptools.BoolPtr(true)
 		fsProps.Android_filesystem_deps.System = proptools.StringPtr(partitions.nameForType("system"))