diff --git a/lib/drb/extservm.rb b/lib/drb/extservm.rb
index 9333a10..d65e377 100644
--- a/lib/drb/extservm.rb
+++ b/lib/drb/extservm.rb
@@ -47,7 +47,7 @@ def service(name)
     def register(name, ro)
       synchronize do
         @servers[name] = ro
-        @cond.signal
+        @cond.broadcast
       end
       self
     end