diff --git a/CHANGES.md b/CHANGES.md
index d3f44310..2c317bc2 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -2,8 +2,14 @@
 
 ## [0.6.14] - 2018-06-21
 
+### Added
+
 * Allow to disable masking for websockets client
 
+### Fixed
+
+* SendRequest execution fails with the "internal error: entered unreachable code" #329
+
 
 ## [0.6.13] - 2018-06-13
 
diff --git a/src/client/pipeline.rs b/src/client/pipeline.rs
index dae7bbaf..44e3d3a3 100644
--- a/src/client/pipeline.rs
+++ b/src/client/pipeline.rs
@@ -380,7 +380,7 @@ impl Pipeline {
             match self.timeout.as_mut().unwrap().poll() {
                 Ok(Async::Ready(())) => return Err(SendRequestError::Timeout),
                 Ok(Async::NotReady) => (),
-                Err(_) => unreachable!(),
+                Err(e) => return Err(e.into()),
             }
         }
         Ok(())