diff --git a/pw_trace/BUILD.gn b/pw_trace/BUILD.gn
index 25111d2..b0e455b 100644
--- a/pw_trace/BUILD.gn
+++ b/pw_trace/BUILD.gn
@@ -17,11 +17,7 @@
 import("$dir_pw_build/facade.gni")
 import("$dir_pw_docgen/docs.gni")
 import("$dir_pw_unit_test/test.gni")
-
-declare_args() {
-  # Backend for the pw_trace module.
-  pw_trace_BACKEND = ""
-}
+import("backend.gni")
 
 config("default_config") {
   include_dirs = [ "public" ]