1 files changed, 4 insertions, 0 deletions
diff --git a/tools/gfx/vk-api.cpp b/tools/gfx/vk-api.cpp
index 4030e43ba..6e250e281 100644
--- a/tools/gfx/vk-api.cpp
+++ b/tools/gfx/vk-api.cpp
@@ -49,11 +49,15 @@ Slang::Result VulkanApi::initInstanceProcs(VkInstance instance)
 
     VK_API_ALL_INSTANCE_PROCS(VK_API_GET_INSTANCE_PROC)
 
+    // Get optional 
+    VK_API_INSTANCE_PROCS_OPT(VK_API_GET_INSTANCE_PROC)
+
     if (!areDefined(ProcType::Instance))
     {
         return SLANG_FAIL;
     }
 
+
     m_instance = instance;
     return SLANG_OK;
 }