diff --git a/spectrum/src/frontends/slack/SlackAPI.h b/spectrum/src/frontends/slack/SlackAPI.h
index 49f3a0c602a7586410002c25f06cfa5f951be955..c6e10da375fcc7dd5cd21b810d8308dabc331233 100644
--- a/spectrum/src/frontends/slack/SlackAPI.h
+++ b/spectrum/src/frontends/slack/SlackAPI.h
@@ -28,8 +28,6 @@
 #include <algorithm>
 #include <map>
 
-#include <boost/signal.hpp>
-
 namespace Transport {
 
 class Component;