diff --git a/src/vs/base/common/console.ts b/src/vs/base/common/console.ts
index ccd30d07a1e..9b49ff985d4 100644
--- a/src/vs/base/common/console.ts
+++ b/src/vs/base/common/console.ts
@@ -131,7 +131,10 @@ export function log(entry: IRemoteConsoleLog, label: string): void {
 	}
 
 	// Log it
-	console[entry.severity].apply(console, consoleArgs);
+	if (typeof (console as any)[entry.severity] !== 'function') {
+		throw new Error('Unknown console method');
+	}
+	(console as any)[entry.severity].apply(console, consoleArgs);
 }
 
 function color(color: string): string {
diff --git a/src/vs/base/parts/storage/node/storage.ts b/src/vs/base/parts/storage/node/storage.ts
index 48e347df1f2..6cebac12c9f 100644
--- a/src/vs/base/parts/storage/node/storage.ts
+++ b/src/vs/base/parts/storage/node/storage.ts
@@ -237,7 +237,7 @@ export class SQLiteStorageDatabase implements IStorageDatabase {
 		const connection = await this.whenConnected;
 		const row = await this.get(connection, full ? 'PRAGMA integrity_check' : 'PRAGMA quick_check');
 
-		const integrity = full ? row['integrity_check'] : row['quick_check'];
+		const integrity = full ? (row as any)['integrity_check'] : (row as any)['quick_check'];
 
 		if (connection.isErroneous) {
 			return `${integrity} (last error: ${connection.lastError})`;
diff --git a/src/vs/workbench/contrib/extensions/common/extensionQuery.ts b/src/vs/workbench/contrib/extensions/common/extensionQuery.ts
index 25b9c3cf909..445e23db188 100644
--- a/src/vs/workbench/contrib/extensions/common/extensionQuery.ts
+++ b/src/vs/workbench/contrib/extensions/common/extensionQuery.ts
@@ -29,8 +29,8 @@ export class Query {
 				if (hasSort && command === 'sort' || hasCategory && command === 'category') {
 					return [];
 				}
-				if (subcommands[command]) {
-					return subcommands[command].map((subcommand: string) => `@${command}:${subcommand}${subcommand === '' ? '' : ' '}`);
+				if ((subcommands as any)[command]) {
+					return (subcommands as any)[command].map((subcommand: string) => `@${command}:${subcommand}${subcommand === '' ? '' : ' '}`);
 				}
 				else {
 					return [`@${command} `];
diff --git a/src/vs/workbench/contrib/quickopen/browser/viewPickerHandler.ts b/src/vs/workbench/contrib/quickopen/browser/viewPickerHandler.ts
index b7aa6827dfc..8c11af81604 100644
--- a/src/vs/workbench/contrib/quickopen/browser/viewPickerHandler.ts
+++ b/src/vs/workbench/contrib/quickopen/browser/viewPickerHandler.ts
@@ -21,6 +21,7 @@ import { IContextKeyService } from 'vs/platform/contextkey/common/contextkey';
 import { ViewletDescriptor } from 'vs/workbench/browser/viewlet';
 import { Registry } from 'vs/platform/registry/common/platform';
 import { CancellationToken } from 'vs/base/common/cancellation';
+import { IStringDictionary } from 'vs/base/common/collections';
 
 export const VIEW_PICKER_PREFIX = 'view ';
 
@@ -101,7 +102,7 @@ export class ViewPickerHandler extends QuickOpenHandler {
 			return true;
 		});
 
-		const entryToCategory = {};
+		const entryToCategory: IStringDictionary<string> = {};
 		entries.forEach(e => {
 			if (!entryToCategory[e.getLabel()]) {
 				entryToCategory[e.getLabel()] = e.getCategory();