Missing include.

diff --git a/src/lib/encoder.h b/src/lib/encoder.h
index 8ab4479efa18d6bf690b04546cc30b87e188afa6..e5916ad3a022bc8f2f9c8c117e182f339d7f3def 100644 (file)
--- a/src/lib/encoder.h
+++ b/src/lib/encoder.h
@@ -28,6 +28,7 @@
 #include <boost/thread/mutex.hpp>
 #include <boost/thread/condition.hpp>
 #include <boost/thread.hpp>
+#include <boost/optional.hpp>
 #include <list>
 #include <stdint.h>
 extern "C" {