diff --git a/src/delegates.hpp b/src/delegates.hpp
index 32492164..0e670b41 100644
--- a/src/delegates.hpp
+++ b/src/delegates.hpp
@@ -8,6 +8,8 @@ using runnable = std::function<void()>;
 template<class T> using supplier = std::function<T()>;
 template<class T> using consumer = std::function<void(T)>;
 
+using KeyCallback = std::function<bool()>;
+
 // data sources
 using wstringsupplier = std::function<std::wstring()>;
 using doublesupplier = std::function<double()>;
diff --git a/src/logic/scripting/lua/lua_util.cpp b/src/logic/scripting/lua/lua_util.cpp
index cdccc12a..18caca40 100644
--- a/src/logic/scripting/lua/lua_util.cpp
+++ b/src/logic/scripting/lua/lua_util.cpp
@@ -247,7 +247,7 @@ runnable lua::create_runnable(State* L) {
     };
 }
 
-supplier<bool> lua::create_simple_handler(State* L) {
+KeyCallback lua::create_simple_handler(State* L) {
     auto funcptr = create_lambda_handler(L);
     return [=]() -> bool {
         getglobal(L, LAMBDAS_TABLE);
diff --git a/src/logic/scripting/lua/lua_util.hpp b/src/logic/scripting/lua/lua_util.hpp
index 4c96ef57..2748d175 100644
--- a/src/logic/scripting/lua/lua_util.hpp
+++ b/src/logic/scripting/lua/lua_util.hpp
@@ -574,7 +574,7 @@ namespace lua {
     }
 
     runnable create_runnable(lua::State*);
-    supplier<bool> create_simple_handler(lua::State*);
+    KeyCallback create_simple_handler(lua::State*);
     scripting::common_func create_lambda(lua::State*);
     scripting::common_func create_lambda_nothrow(lua::State*);
 
diff --git a/src/window/Events.hpp b/src/window/Events.hpp
index 9cf3074d..67ab111a 100644
--- a/src/window/Events.hpp
+++ b/src/window/Events.hpp
@@ -4,6 +4,7 @@
 #include <unordered_map>
 #include <vector>
 
+#include "delegates.hpp"
 #include "typedefs.hpp"
 #include "input.hpp"
 
@@ -20,8 +21,6 @@ class Events {
     static uint currentFrame;
     static bool cursor_drag;
 public:
-    using KeyCallback = std::function<bool()>;
-
     static int scroll;
     static glm::vec2 delta;
     static glm::vec2 cursor;