diff --git a/tools/hello.cpp b/tools/hello.cpp
index acba2aa..4ec9632 100644
--- a/tools/hello.cpp
+++ b/tools/hello.cpp
@@ -299,12 +299,16 @@ VkResult _vkCreateDebugReportCallbackEXT (
     const VkAllocationCallbacks* pAllocator,
     VkDebugReportCallbackEXT* pCallback
 ) noexcept {
-    return reinterpret_cast<decltype(_vkCreateDebugReportCallbackEXT)*> (
+    static auto fn = reinterpret_cast<
+        decltype(_vkCreateDebugReportCallbackEXT)*
+    > (
         vkGetInstanceProcAddr (
             instance,
             "vkCreateDebugReportCallbackEXT"
         )
-    ) (instance, pCreateInfo, pAllocator, pCallback);
+    );
+
+    return fn (instance, pCreateInfo, pAllocator, pCallback);
 }