diff --git a/.clang-tidy b/.clang-tidy
new file mode 100644
index 000000000..0887b8670
--- /dev/null
+++ b/.clang-tidy
@@ -0,0 +1,3 @@
+# We use pointers to aggregates in a couple of places, intentionally.
+# void * would look weird.
+Checks: '-bugprone-sizeof-expression'