diff --git a/examples/vulkan_example/imgui_impl_glfw_vulkan.cpp b/examples/vulkan_example/imgui_impl_glfw_vulkan.cpp
index ef9da895..6ac4e4c0 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]);
@@ -483,6 +483,7 @@ bool ImGui_ImplGlfwVulkan_CreateFontsTexture(VkCommandBuffer command_buffer)
         region.imageSubresource.layerCount = 1;
         region.imageExtent.width = width;
         region.imageExtent.height = height;
+        region.imageExtent.depth = 1;
         vkCmdCopyBufferToImage(command_buffer, g_UploadBuffer, g_FontImage, VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL, 1, &region);
 
         VkImageMemoryBarrier use_barrier[1] = {};