diff --git a/src/callbacks.jl b/src/callbacks.jl
index 9a526d8..4fc8586 100644
--- a/src/callbacks.jl
+++ b/src/callbacks.jl
@@ -50,7 +50,7 @@ returns `Signal{NTuple{4, Int}}`
 """
 function keyboard_buttons(window, s::Signal{NTuple{4, Int}}=Signal((0,0,0,0)))
     keydict = Dict{Int, Bool}()
-    GLFW.SetKeyCallback(window, (window, button::Cint, scancode::Cint, action::Cint, mods::Cint) -> begin
+    GLFW.SetKeyCallback(window, (window, button, scancode, action, mods) -> begin
         push!(s, (Int(button), Int(scancode), Int(action), Int(mods)))
     end)
     s
@@ -62,7 +62,7 @@ containing the pressed button the action and modifiers.
 [GLFW Docs](http://www.glfw.org/docs/latest/group__input.html#ga1e008c7a8751cea648c8f42cc91104cf)
 """
 function mouse_buttons(window, s::Signal{NTuple{3, Int}}=Signal((0,0,0)))
-    GLFW.SetMouseButtonCallback(window, (window, button::Cint, action::Cint, mods::Cint) -> begin
+    GLFW.SetMouseButtonCallback(window, (window, button, action, mods) -> begin
         push!(s, (Int(button), Int(action), Int(mods)))
     end)
     s
diff --git a/src/events.jl b/src/events.jl
index ec3cb2b..0d94432 100644
--- a/src/events.jl
+++ b/src/events.jl
@@ -17,7 +17,7 @@ end
 
 function add_complex_signals!(screen)
     @materialize keyboard_buttons, mouse_buttons = screen.inputs
-    
+
     no_scancode = map(remove_scancode, keyboard_buttons)
 
     button_s = merge(
@@ -47,12 +47,12 @@ Builds a Set of keys, accounting for released and pressed keys
 """
 function currently_pressed_keys(v0::Set{Int}, button_action_mods)
     button, action, mods = button_action_mods
-    if button != GLFW.KEY_UNKNOWN
-        if action == GLFW.PRESS
+    if button != Int(GLFW.KEY_UNKNOWN)
+        if action == Int(GLFW.PRESS)
             push!(v0, button)
-        elseif action == GLFW.RELEASE
+        elseif action == Int(GLFW.RELEASE)
             delete!(v0, button)
-        elseif action == GLFW.REPEAT
+        elseif action == Int(GLFW.REPEAT)
             # nothing needs to be done, besides returning the same set of keys
         else
             error("Unrecognized enum value for GLFW button press action: $action")
diff --git a/src/screen.jl b/src/screen.jl
index d32c571..1368279 100644
--- a/src/screen.jl
+++ b/src/screen.jl
@@ -505,7 +505,7 @@ function destroy!(screen::Screen)
         end
         if nw.handle != C_NULL
             GLFW.DestroyWindow(nw)
-            nw.handle = C_NULL
+            # nw.handle = C_NULL
         end
     else # delete from parent
         filter!(s-> !(s===screen), screen.parent.children) # remove from parent