diff --git a/winit/src/conversion.rs b/winit/src/conversion.rs
index ecc3432063..2e382c396c 100644
--- a/winit/src/conversion.rs
+++ b/winit/src/conversion.rs
@@ -465,32 +465,32 @@ pub fn key_code(key: &winit::keyboard::Key) -> keyboard::KeyCode {
             "8" => KeyCode::Key8,
             "9" => KeyCode::Key9,
             "0" => KeyCode::Key0,
-            "A" => KeyCode::A,
-            "B" => KeyCode::B,
-            "C" => KeyCode::C,
-            "D" => KeyCode::D,
-            "E" => KeyCode::E,
-            "F" => KeyCode::F,
-            "G" => KeyCode::G,
-            "H" => KeyCode::H,
-            "I" => KeyCode::I,
-            "J" => KeyCode::J,
-            "K" => KeyCode::K,
-            "L" => KeyCode::L,
-            "M" => KeyCode::M,
-            "N" => KeyCode::N,
-            "O" => KeyCode::O,
-            "P" => KeyCode::P,
-            "Q" => KeyCode::Q,
-            "R" => KeyCode::R,
-            "S" => KeyCode::S,
-            "T" => KeyCode::T,
-            "U" => KeyCode::U,
-            "V" => KeyCode::V,
-            "W" => KeyCode::W,
-            "X" => KeyCode::X,
-            "Y" => KeyCode::Y,
-            "Z" => KeyCode::Z,
+            "a" => KeyCode::A,
+            "b" => KeyCode::B,
+            "c" => KeyCode::C,
+            "d" => KeyCode::D,
+            "e" => KeyCode::E,
+            "f" => KeyCode::F,
+            "g" => KeyCode::G,
+            "h" => KeyCode::H,
+            "i" => KeyCode::I,
+            "j" => KeyCode::J,
+            "k" => KeyCode::K,
+            "l" => KeyCode::L,
+            "m" => KeyCode::M,
+            "n" => KeyCode::N,
+            "o" => KeyCode::O,
+            "p" => KeyCode::P,
+            "q" => KeyCode::Q,
+            "r" => KeyCode::R,
+            "s" => KeyCode::S,
+            "t" => KeyCode::T,
+            "u" => KeyCode::U,
+            "v" => KeyCode::V,
+            "w" => KeyCode::W,
+            "x" => KeyCode::X,
+            "y" => KeyCode::Y,
+            "z" => KeyCode::Z,
             _ => KeyCode::Unlabeled,
         },
         winit::keyboard::Key::Named(named_key) => match named_key {