diff --git a/src/message.jl b/src/message.jl
index cdeb292..b6e5bba 100644
--- a/src/message.jl
+++ b/src/message.jl
@@ -116,6 +116,7 @@ Base.unsafe_string(zmsg::Message) = @preserve zmsg unsafe_string(pointer(zmsg),
 function Base.convert(::Type{IOStream}, zmsg::Message)
     s = IOBuffer()
     write(s, zmsg)
+    seek(s, 0)
     return s
 end