diff --git a/src/cdk/keycodes/keycodes.ts b/src/cdk/keycodes/keycodes.ts
index f8e93d23edbb..c461f3cc9f19 100644
--- a/src/cdk/keycodes/keycodes.ts
+++ b/src/cdk/keycodes/keycodes.ts
@@ -23,5 +23,5 @@ export const DELETE = 46;
 export const A = 65;
 export const Z = 90;
 export const ZERO = 48;
-export const NINE = 91;
+export const NINE = 57;
 export const COMMA = 188;