diff --git a/packages/builder/lib/lbt/calls/SapUiDefine.js b/packages/builder/lib/lbt/calls/SapUiDefine.js
index 0bf1c515e2f..ad9dac794bb 100644
--- a/packages/builder/lib/lbt/calls/SapUiDefine.js
+++ b/packages/builder/lib/lbt/calls/SapUiDefine.js
@@ -39,7 +39,7 @@ class SapUiDefineCall {
 			this.dependencies = this.dependencyArray.elements.map( (elem) => {
 				const value = getStringValue(elem);
 				if ( !value ) {
-					throw new TypeError();
+					throw new TypeError(`dependency element is not a string literal in module ${this.name}`);
 				}
 				return resolveRelativeRequireJSName(this.name, value);
 			});
diff --git a/packages/server/lib/middleware/MiddlewareManager.js b/packages/server/lib/middleware/MiddlewareManager.js
index 36894892e4d..ad8ebbea151 100644
--- a/packages/server/lib/middleware/MiddlewareManager.js
+++ b/packages/server/lib/middleware/MiddlewareManager.js
@@ -245,7 +245,7 @@ class MiddlewareManager {
 	async addCustomMiddleware() {
 		const project = this.graph.getRoot();
 		const projectCustomMiddleware = project.getCustomMiddleware();
-		if (!projectCustomMiddleware.length === 0) {
+		if (projectCustomMiddleware.length === 0) {
 			return; // No custom middleware defined
 		}