diff --git a/src/rsfilesrc.rs b/src/rsfilesrc.rs
index 9cb744a5..01766f91 100644
--- a/src/rsfilesrc.rs
+++ b/src/rsfilesrc.rs
@@ -16,6 +16,9 @@ pub struct FileSrc {
     position: u64,
 }
 
+unsafe impl Sync for FileSrc {}
+unsafe impl Send for FileSrc {}
+
 impl FileSrc {
     fn new() -> FileSrc {
         FileSrc { location: None, file: None, position: 0 }
diff --git a/src/rshttpsrc.rs b/src/rshttpsrc.rs
index 3b2add3d..332ef76b 100644
--- a/src/rshttpsrc.rs
+++ b/src/rshttpsrc.rs
@@ -22,6 +22,9 @@ pub struct HttpSrc {
     stop: u64,
 }
 
+unsafe impl Sync for HttpSrc {}
+unsafe impl Send for HttpSrc {}
+
 impl HttpSrc {
     fn new() -> HttpSrc {
         HttpSrc { url: None, client: Client::new(), response: None, seekable: false, position: 0, size: u64::MAX, start: 0, stop: u64::MAX }
diff --git a/src/rssource.rs b/src/rssource.rs
index 1aac363e..a6bcbbe0 100644
--- a/src/rssource.rs
+++ b/src/rssource.rs
@@ -5,7 +5,7 @@ use std::ptr;
 
 use utils::*;
 
-pub trait Source {
+pub trait Source: Sync + Send {
     fn set_uri(&mut self, uri_str: &Option<String>) -> bool;
     fn get_uri(&self) -> Option<String>;
     fn is_seekable(&self) -> bool;