--- a/build/linux/unbundle/brotli.gn
+++ b/build/linux/unbundle/brotli.gn
@@ -20,6 +20,10 @@
   ]
 }
 
+source_set("headers") {
+  deps = [ ":brotli_shim" ]
+}
+
 source_set("dec") {
   deps = [ ":brotli_shim" ]
   public_configs = [ ":system_brotli_dec" ]