diff --git a/src/mouse.ts b/src/mouse.ts
index 94118c6..a0641dd 100644
--- a/src/mouse.ts
+++ b/src/mouse.ts
@@ -26,7 +26,8 @@ export class Mouse {
 				if (processed) return;
 				if (
 					input.UserInputType === Enum.UserInputType.MouseButton1 ||
-					input.UserInputType === Enum.UserInputType.MouseButton2
+					input.UserInputType === Enum.UserInputType.MouseButton2 ||
+					input.UserInputType === Enum.UserInputType.MouseButton3
 				) {
 					const signal = this.mouseDownSignals.get(input.UserInputType);
 					if (signal) {
@@ -40,7 +41,8 @@ export class Mouse {
 				if (processed) return;
 				if (
 					input.UserInputType === Enum.UserInputType.MouseButton1 ||
-					input.UserInputType === Enum.UserInputType.MouseButton2
+					input.UserInputType === Enum.UserInputType.MouseButton2 ||
+					input.UserInputType === Enum.UserInputType.MouseButton3
 				) {
 					const signal = this.mouseUpSignals.get(input.UserInputType);
 					if (signal) {
diff --git a/src/types.ts b/src/types.ts
index 85549a3..06f5e21 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -73,7 +73,7 @@ export namespace Clack {
 	/**
 	 * Represents `Enum.UserInputType` mouse buttons.
 	 */
-	export type MouseButton = Enum.UserInputType.MouseButton1 | Enum.UserInputType.MouseButton2;
+	export type MouseButton = Enum.UserInputType.MouseButton1 | Enum.UserInputType.MouseButton2 | Enum.UserInputType.MouseButton3;
 
 	/** Enum representing the user's preferred input type. */
 	export const enum InputType {