diff --git a/src/menus.rs b/src/menus.rs
index 88d3d93..2c80535 100644
--- a/src/menus.rs
+++ b/src/menus.rs
@@ -4,6 +4,7 @@ use std::ptr;
 
 use super::{Ui, ImStr};
 
+#[must_use]
 pub struct Menu<'ui, 'p> {
     label: ImStr<'p>,
     enabled: bool,
@@ -34,6 +35,7 @@ impl<'ui, 'p> Menu<'ui, 'p> {
     }
 }
 
+#[must_use]
 pub struct MenuItem<'ui, 'p> {
     label: ImStr<'p>,
     shortcut: Option<ImStr<'p>>,
diff --git a/src/sliders.rs b/src/sliders.rs
index cc361aa..f1d89ef 100644
--- a/src/sliders.rs
+++ b/src/sliders.rs
@@ -5,6 +5,7 @@ use super::{Ui, ImStr};
 
 // TODO: Consider using Range, even though it is half-open
 
+#[must_use]
 pub struct SliderInt<'ui, 'p> {
     label: ImStr<'p>,
     value: &'p mut i32,
@@ -41,6 +42,7 @@ impl<'ui, 'p> SliderInt<'ui, 'p> {
     }
 }
 
+#[must_use]
 pub struct SliderFloat<'ui, 'p> {
     label: ImStr<'p>,
     value: &'p mut f32,
diff --git a/src/trees.rs b/src/trees.rs
index 9352059..975c7f8 100644
--- a/src/trees.rs
+++ b/src/trees.rs
@@ -3,6 +3,7 @@ use std::marker::PhantomData;
 
 use super::{Ui, ImGuiSetCond, ImStr};
 
+#[must_use]
 pub struct TreeNode<'ui, 'p> {
     id: ImStr<'p>,
     label: Option<ImStr<'p>>,
diff --git a/src/widgets.rs b/src/widgets.rs
index 0ec8ed4..8c4c740 100644
--- a/src/widgets.rs
+++ b/src/widgets.rs
@@ -4,6 +4,7 @@ use std::ptr;
 
 use super::{Ui, ImStr};
 
+#[must_use]
 pub struct CollapsingHeader<'ui, 'p> {
     label: ImStr<'p>,
     str_id: Option<ImStr<'p>>,
diff --git a/src/window.rs b/src/window.rs
index 30eb451..883940e 100644
--- a/src/window.rs
+++ b/src/window.rs
@@ -13,6 +13,7 @@ use super::{
     ImStr, ImVec2
 };
 
+#[must_use]
 pub struct Window<'ui, 'p> {
     pos: (f32, f32),
     pos_cond: ImGuiSetCond,