diff --git a/src/VkBootstrap.cpp b/src/VkBootstrap.cpp
index 4f9b3b2..b4bafa2 100644
--- a/src/VkBootstrap.cpp
+++ b/src/VkBootstrap.cpp
@@ -1259,13 +1259,13 @@ PhysicalDeviceSelector& PhysicalDeviceSelector::set_desired_version(uint32_t maj
 #if defined(VK_API_VERSION_1_2)
 // Just calls add_required_features
 PhysicalDeviceSelector& PhysicalDeviceSelector::set_required_features_11(
-    VkPhysicalDeviceVulkan11Features features_11) {
+    VkPhysicalDeviceVulkan11Features& features_11) {
 	features_11.sType = VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_VULKAN_1_1_FEATURES;
     add_required_extension_features(features_11);
     return *this;
 }
 PhysicalDeviceSelector& PhysicalDeviceSelector::set_required_features_12(
-    VkPhysicalDeviceVulkan12Features features_12) {
+    VkPhysicalDeviceVulkan12Features& features_12) {
 	features_12.sType = VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_VULKAN_1_2_FEATURES;
 	add_required_extension_features(features_12);
     return *this;
diff --git a/src/VkBootstrap.h b/src/VkBootstrap.h
index 2379f3c..4a03925 100644
--- a/src/VkBootstrap.h
+++ b/src/VkBootstrap.h
@@ -549,10 +549,10 @@ class PhysicalDeviceSelector {
 #if defined(VK_API_VERSION_1_2)
     // Require a physical device which supports the features in VkPhysicalDeviceVulkan11Features.
     // Must have vulkan version 1.2 - This is due to the VkPhysicalDeviceVulkan11Features struct being added in 1.2, not 1.1
-    PhysicalDeviceSelector& set_required_features_11(VkPhysicalDeviceVulkan11Features features_11);
+    PhysicalDeviceSelector& set_required_features_11(VkPhysicalDeviceVulkan11Features& features_11);
     // Require a physical device which supports the features in VkPhysicalDeviceVulkan12Features.
     // Must have vulkan version 1.2
-    PhysicalDeviceSelector& set_required_features_12(VkPhysicalDeviceVulkan12Features features_12);
+    PhysicalDeviceSelector& set_required_features_12(VkPhysicalDeviceVulkan12Features& features_12);
 #endif
 
 	// Used when surface creation happens after physical device selection.