diff --git a/cc/lto.go b/cc/lto.go
index 7bc22ec..91b11b5 100644
--- a/cc/lto.go
+++ b/cc/lto.go
@@ -82,7 +82,8 @@
 		flags.LdFlags = append(flags.LdFlags, ltoFlag)
 		if ctx.Device() {
 			// Work around bug in Clang that doesn't pass correct emulated
-			// TLS option to target
+			// TLS option to target. See b/72706604 or
+			// https://github.com/android-ndk/ndk/issues/498.
 			flags.LdFlags = append(flags.LdFlags, "-Wl,-plugin-opt,-emulated-tls")
 		}
 		flags.ArFlags = append(flags.ArFlags, " --plugin ${config.LLVMGoldPlugin}")