diff --git a/lib/ProgressPlugin.js b/lib/ProgressPlugin.js
index 3635a5514..231d73597 100644
--- a/lib/ProgressPlugin.js
+++ b/lib/ProgressPlugin.js
@@ -115,7 +115,7 @@ class ProgressPlugin {
 		}
 
 		options = options || {};
-		validateOptions(schema, options || {}, {
+		validateOptions(schema, options, {
 			name: "Progress Plugin",
 			baseDataPath: "options"
 		});
diff --git a/lib/SourceMapDevToolPlugin.js b/lib/SourceMapDevToolPlugin.js
index ac7eb52c6..e8050e979 100644
--- a/lib/SourceMapDevToolPlugin.js
+++ b/lib/SourceMapDevToolPlugin.js
@@ -98,7 +98,7 @@ class SourceMapDevToolPlugin {
 	 * @throws {Error} throws error, if got more than 1 arguments
 	 */
 	constructor(options = {}) {
-		validateOptions(schema, options || {}, {
+		validateOptions(schema, options, {
 			name: "SourceMap DevTool Plugin",
 			baseDataPath: "options"
 		});