diff --git a/cc/relocation_packer.go b/cc/relocation_packer.go
index f6a1fe4..8989b29 100644
--- a/cc/relocation_packer.go
+++ b/cc/relocation_packer.go
@@ -33,6 +33,7 @@
 	})
 
 type RelocationPackerProperties struct {
+	// Generate compact dynamic relocation table, default true.
 	Pack_relocations *bool `android:"arch_variant"`
 
 	// This will be true even if we're embedded in Make, in which case