diff --git a/libs/vkd3d/device.c b/libs/vkd3d/device.c
index 8504518d..19b219d4 100644
--- a/libs/vkd3d/device.c
+++ b/libs/vkd3d/device.c
@@ -1723,6 +1723,12 @@ static HRESULT vkd3d_init_device_caps(struct d3d12_device *device,
                 VKD3D_SHADER_TARGET_EXTENSION_READ_STORAGE_IMAGE_WITHOUT_FORMAT;
     }
 
+    if (device->device_info.ray_tracing_pipeline_features.rayTraversalPrimitiveCulling)
+    {
+        vulkan_info->shader_extensions[vulkan_info->shader_extension_count++] =
+                VKD3D_SHADER_TARGET_EXTENSION_RAY_TRACING_PRIMITIVE_CULLING;
+    }
+
     /* Disable unused Vulkan features. */
     features->shaderTessellationAndGeometryPointSize = VK_FALSE;
 
diff --git a/libs/vkd3d/vkd3d_private.h b/libs/vkd3d/vkd3d_private.h
index d00cc58f..2e490e73 100644
--- a/libs/vkd3d/vkd3d_private.h
+++ b/libs/vkd3d/vkd3d_private.h
@@ -49,7 +49,7 @@
 #define MAKE_MAGIC(a,b,c,d) (((uint32_t)a) | (((uint32_t)b) << 8) | (((uint32_t)c) << 16) | (((uint32_t)d) << 24))
 
 #define VKD3D_MAX_COMPATIBLE_FORMAT_COUNT 6u
-#define VKD3D_MAX_SHADER_EXTENSIONS       3u
+#define VKD3D_MAX_SHADER_EXTENSIONS       4u
 #define VKD3D_MAX_SHADER_STAGES           5u
 #define VKD3D_MAX_VK_SYNC_OBJECTS         4u