diff --git a/gn/standalone/BUILD.gn b/gn/standalone/BUILD.gn
index 0c77eca..c52b7c1 100644
--- a/gn/standalone/BUILD.gn
+++ b/gn/standalone/BUILD.gn
@@ -20,6 +20,7 @@
   cflags = [
     "-Wall",
     "-Wextra",
+    "-Wpedantic",
   ]
 
   # Disable Weverything on fuzzers to avoid breakages when new versions of clang