diff --git a/src/libstd/sys/unix/backtrace/tracing/backtrace_fn.rs b/src/libstd/sys/unix/backtrace/tracing/backtrace_fn.rs
index 3e997a677bf..ecd32aa9462 100644
--- a/src/libstd/sys/unix/backtrace/tracing/backtrace_fn.rs
+++ b/src/libstd/sys/unix/backtrace/tracing/backtrace_fn.rs
@@ -20,7 +20,6 @@
 
 use io;
 use libc;
-use mem;
 use sys::backtrace::BacktraceContext;
 use sys_common::backtrace::Frame;