diff --git a/src/VkBootstrap.h b/src/VkBootstrap.h
index 2379f3c..3efc232 100644
--- a/src/VkBootstrap.h
+++ b/src/VkBootstrap.h
@@ -538,6 +538,8 @@ class PhysicalDeviceSelector {
 #if defined(VK_API_VERSION_1_1)
     template <typename T>
     PhysicalDeviceSelector& add_required_extension_features(T const& features) {
+		assert(features.sType != 0 &&
+		       "Features struct sType must be filled with the struct's corresponding VkStructureType enum");
         criteria.extension_features.push_back(detail::ExtensionFeatures::make(features));
         return *this;
     }