diff --git a/sys/src/avfilter/buffersrc.rs b/sys/src/avfilter/buffersrc.rs
index b5b3d4c..a93dfd1 100644
--- a/sys/src/avfilter/buffersrc.rs
+++ b/sys/src/avfilter/buffersrc.rs
@@ -1,5 +1,5 @@
 use libc::{c_int, c_uint};
-use ::avfilter::filter::{AVFilterContext, AVFilterBufferRef};
+use ::avfilter::filter::{AVFilterContext};
 use ::avutil::AVFrame;
 
 pub const AV_BUFFERSRC_FLAG_NO_CHECK_FORMAT: c_int = 1;
diff --git a/sys/src/avutil/frame.rs b/sys/src/avutil/frame.rs
index 6f80e18..9939b50 100644
--- a/sys/src/avutil/frame.rs
+++ b/sys/src/avutil/frame.rs
@@ -1,5 +1,5 @@
-use libc::{c_void, c_char, c_short, c_int, int8_t, uint8_t};
-use libc::{int16_t, uint32_t, int64_t, uint64_t};
+use libc::{c_void, c_char, c_int, uint8_t};
+use libc::{int64_t, uint64_t};
 use super::dict::AVDictionary;
 use super::rational::AVRational;
 use super::buffer::AVBufferRef;
diff --git a/sys/src/lib.rs b/sys/src/lib.rs
index e8ed7b7..e260baf 100644
--- a/sys/src/lib.rs
+++ b/sys/src/lib.rs
@@ -1,4 +1,4 @@
-#![allow(non_camel_case_types, raw_pointer_derive, non_snake_case, non_upper_case_globals)]
+#![allow(non_camel_case_types, non_snake_case, non_upper_case_globals)]
 
 extern crate libc;