diff --git a/lib/hook.cpp b/lib/hook.cpp
index e163c7cf1..61a6f59bc 100644
--- a/lib/hook.cpp
+++ b/lib/hook.cpp
@@ -12,6 +12,7 @@
 #include <villas/node/config.hpp>
 #include <villas/node/exceptions.hpp>
 #include <villas/path.hpp>
+#include <villas/signal_list.hpp>
 #include <villas/timing.hpp>
 #include <villas/utils.hpp>
 
@@ -26,7 +27,7 @@ Hook::Hook(Path *p, Node *n, int fl, int prio, bool en)
                 ? State::CHECKED
                 : State::INITIALIZED), // We dont need to parse builtin hooks
       flags(fl), priority(prio), enabled(en), path(p), node(n),
-      config(nullptr) {}
+      signals(std::make_shared<SignalList>()), config(nullptr) {}
 
 void Hook::prepare(SignalList::Ptr sigs) {
   assert(state == State::CHECKED);