diff --git a/imgui/src/input/keyboard.rs b/imgui/src/input/keyboard.rs
index 91f20bd..9a2ccb1 100644
--- a/imgui/src/input/keyboard.rs
+++ b/imgui/src/input/keyboard.rs
@@ -5,6 +5,7 @@ use crate::Ui;
 #[repr(u32)]
 #[derive(Copy, Clone, Debug, Hash, Eq, PartialEq)]
 #[allow(missing_docs)] // Self-describing
+#[non_exhaustive]
 pub enum Key {
     Tab = sys::ImGuiKey_Tab,
     LeftArrow = sys::ImGuiKey_LeftArrow,
diff --git a/imgui/src/style.rs b/imgui/src/style.rs
index f6effbf..d2b5d1f 100644
--- a/imgui/src/style.rs
+++ b/imgui/src/style.rs
@@ -212,6 +212,7 @@ impl IndexMut<StyleColor> for Style {
 /// [`crate::Ui::show_demo_window`] until you spot it
 #[repr(u32)]
 #[derive(Copy, Clone, Debug, Hash, Eq, PartialEq)]
+#[non_exhaustive]
 pub enum StyleColor {
     /// Default color of text througout application
     Text = sys::ImGuiCol_Text,
@@ -500,6 +501,7 @@ impl std::error::Error for InvalidStyleColorValue {}
 
 /// A temporary change in user interface style
 #[derive(Copy, Clone, Debug, PartialEq)]
+#[non_exhaustive]
 pub enum StyleVar {
     /// Global alpha applies to everything
     Alpha(f32),