diff --git a/include/vulkan/vk_icd.h b/include/vulkan/vk_icd.h
index dce9b74..fa110f4 100644
--- a/include/vulkan/vk_icd.h
+++ b/include/vulkan/vk_icd.h
@@ -25,6 +25,12 @@
 
 #include "vulkan.h"
 
+/*
+ * Loader-ICD version negotiation API
+ */
+#define CURRENT_LOADER_ICD_INTERFACE_VERSION 2
+#define MIN_SUPPORTED_LOADER_ICD_INTERFACE_VERSION 0
+typedef VkResult (VKAPI_PTR *PFN_vkNegotiateLoaderICDInterfaceVersion)(uint32_t *pVersion);
 /*
  * The ICD must reserve space for a pointer for the loader's dispatch
  * table, at the start of <each object>.