2 files changed, 7 insertions, 4 deletions
diff --git a/runtime/src/multi_window/program.rs b/runtime/src/multi_window/program.rs
index 591b3e9a..963a09d7 100644
--- a/runtime/src/multi_window/program.rs
+++ b/runtime/src/multi_window/program.rs
@@ -12,6 +12,9 @@ pub trait Program: Sized {
     /// The type of __messages__ your [`Program`] will produce.
     type Message: std::fmt::Debug + Send;
 
+    /// The theme used to draw the [`Program`].
+    type Theme;
+
     /// Handles a __message__ and updates the state of the [`Program`].
     ///
     /// This is where you define your __update logic__. All the __messages__,
@@ -28,5 +31,5 @@ pub trait Program: Sized {
     fn view(
         &self,
         window: window::Id,
-    ) -> Element<'_, Self::Message, Self::Renderer>;
+    ) -> Element<'_, Self::Message, Self::Theme, Self::Renderer>;
 }
diff --git a/runtime/src/multi_window/state.rs b/runtime/src/multi_window/state.rs
index 49f72c39..afd04519 100644
--- a/runtime/src/multi_window/state.rs
+++ b/runtime/src/multi_window/state.rs
@@ -92,7 +92,7 @@ where
         bounds: Size,
         cursor: mouse::Cursor,
         renderer: &mut P::Renderer,
-        theme: &<P::Renderer as iced_core::Renderer>::Theme,
+        theme: &P::Theme,
         style: &renderer::Style,
         clipboard: &mut dyn Clipboard,
         debug: &mut Debug,
@@ -252,7 +252,7 @@ fn build_user_interfaces<'a, P: Program>(
     renderer: &mut P::Renderer,
     size: Size,
     debug: &mut Debug,
-) -> Vec<UserInterface<'a, P::Message, P::Renderer>> {
+) -> Vec<UserInterface<'a, P::Message, P::Theme, P::Renderer>> {
     caches
         .drain(..)
         .map(|cache| {
@@ -267,7 +267,7 @@ fn build_user_interface<'a, P: Program>(
     renderer: &mut P::Renderer,
     size: Size,
     debug: &mut Debug,
-) -> UserInterface<'a, P::Message, P::Renderer> {
+) -> UserInterface<'a, P::Message, P::Theme, P::Renderer> {
     debug.view_started();
     let view = program.view();
     debug.view_finished();