diff --git a/examples/vulkan_example/imgui_impl_glfw_vulkan.cpp b/examples/vulkan_example/imgui_impl_glfw_vulkan.cpp
index e7dfe32b..e5bc426a 100644
--- a/examples/vulkan_example/imgui_impl_glfw_vulkan.cpp
+++ b/examples/vulkan_example/imgui_impl_glfw_vulkan.cpp
@@ -236,10 +236,10 @@ void ImGui_ImplGlfwVulkan_RenderDrawLists(ImDrawData* draw_data)
         VkMappedMemoryRange range[2] = {};
         range[0].sType = VK_STRUCTURE_TYPE_MAPPED_MEMORY_RANGE;
         range[0].memory = g_VertexBufferMemory[g_FrameIndex];
-        range[0].size = vertex_size;
+        range[0].size = VK_WHOLE_SIZE;
         range[1].sType = VK_STRUCTURE_TYPE_MAPPED_MEMORY_RANGE;
         range[1].memory = g_IndexBufferMemory[g_FrameIndex];
-        range[1].size = index_size;
+        range[1].size = VK_WHOLE_SIZE;
         err = vkFlushMappedMemoryRanges(g_Device, 2, range);
         ImGui_ImplGlfwVulkan_VkResult(err);
         vkUnmapMemory(g_Device, g_VertexBufferMemory[g_FrameIndex]);
@@ -304,7 +304,7 @@ void ImGui_ImplGlfwVulkan_RenderDrawLists(ImDrawData* draw_data)
                 scissor.offset.x = (int32_t)(pcmd->ClipRect.x) > 0 ? (int32_t)(pcmd->ClipRect.x) : 0;
                 scissor.offset.y = (int32_t)(pcmd->ClipRect.y) > 0 ? (int32_t)(pcmd->ClipRect.y) : 0;
                 scissor.extent.width = (uint32_t)(pcmd->ClipRect.z - pcmd->ClipRect.x);
-                scissor.extent.height = (uint32_t)(pcmd->ClipRect.w - pcmd->ClipRect.y + 1); // TODO: + 1??????
+                scissor.extent.height = (uint32_t)(pcmd->ClipRect.w - pcmd->ClipRect.y + 1); // FIXME: Why +1 here?
                 vkCmdSetScissor(g_CommandBuffer, 0, 1, &scissor);
                 vkCmdDrawIndexed(g_CommandBuffer, pcmd->ElemCount, 1, idx_offset, vtx_offset, 0);
             }