diff --git a/src/vs/vscode.proposed.d.ts b/src/vs/vscode.proposed.d.ts
index 28465f58328..0eae941dfad 100644
--- a/src/vs/vscode.proposed.d.ts
+++ b/src/vs/vscode.proposed.d.ts
@@ -727,11 +727,6 @@ declare module 'vscode' {
 	 */
 	export interface SourceControlInputBox {
 
-		/**
-		 * Sets focus to the input.
-		 */
-		focus(): void;
-
 		/**
 		 * Shows a transient contextual message on the input.
 		 */
@@ -2921,4 +2916,16 @@ declare module 'vscode' {
 		export function registerPortAttributesProvider(portSelector: { pid?: number, portRange?: [number, number], commandMatcher?: RegExp }, provider: PortAttributesProvider): Disposable;
 	}
 	//#endregion
+
+	// region https://github.com/microsoft/vscode/issues/119904 @eamodio
+
+	export interface SourceControlInputBox {
+
+		/**
+		 * Sets focus to the input.
+		 */
+		focus(): void;
+	}
+
+	//#endregion
 }
diff --git a/src/vs/workbench/api/common/extHostSCM.ts b/src/vs/workbench/api/common/extHostSCM.ts
index 2faa67c51f8..41aa464d8d7 100644
--- a/src/vs/workbench/api/common/extHostSCM.ts
+++ b/src/vs/workbench/api/common/extHostSCM.ts
@@ -260,6 +260,8 @@ export class ExtHostSCMInputBox implements vscode.SourceControlInputBox {
 	}
 
 	focus(): void {
+		checkProposedApiEnabled(this._extension);
+
 		if (!this._visible) {
 			this.visible = true;
 		}
@@ -268,6 +270,8 @@ export class ExtHostSCMInputBox implements vscode.SourceControlInputBox {
 	}
 
 	showValidationMessage(message: string, type: vscode.SourceControlInputBoxValidationType) {
+		checkProposedApiEnabled(this._extension);
+
 		this._proxy.$showValidationMessage(this._sourceControlHandle, message, type as any);
 	}