diff --git a/src/inspector/unofficial.gni b/src/inspector/unofficial.gni
index 4810d93eb971b2..48cf5102630737 100644
--- a/src/inspector/unofficial.gni
+++ b/src/inspector/unofficial.gni
@@ -29,7 +29,7 @@ template("inspector_gn_build") {
     deps = [ ":node_protocol_json" ]
 
     outputs = gypi_values.node_inspector_generated_sources
-    inputs = gypi_values.node_protocol_files + [
+    inputs = gypi_values.node_protocol_files + gypi_values.node_pdl_files + [
       "node_protocol_config.json",
       "$node_gen_dir/src/node_protocol.json",
     ]