diff --git a/sqlx-core/src/postgres/types/mod.rs b/sqlx-core/src/postgres/types/mod.rs
index ab202c40..4566766e 100644
--- a/sqlx-core/src/postgres/types/mod.rs
+++ b/sqlx-core/src/postgres/types/mod.rs
@@ -61,6 +61,7 @@ impl PgTypeInfo {
         }
     }
 
+    #[doc(hidden)]
     pub fn oid(&self) -> u32 {
         self.id.0
     }