diff --git a/postgres_ffi/src/lib.rs b/postgres_ffi/src/lib.rs
index e7553721b2..88128bb7df 100644
--- a/postgres_ffi/src/lib.rs
+++ b/postgres_ffi/src/lib.rs
@@ -1,6 +1,9 @@
 #![allow(non_upper_case_globals)]
 #![allow(non_camel_case_types)]
 #![allow(non_snake_case)]
+// suppress warnings on rust 1.53 due to bindgen unit tests.
+// https://github.com/rust-lang/rust-bindgen/issues/1651
+#![allow(deref_nullptr)]
 include!(concat!(env!("OUT_DIR"), "/bindings.rs"));
 
 pub mod controlfile_utils;