diff --git a/examples/imgui/main.cpp b/examples/imgui/main.cpp
index cc86b47f..d2e29baf 100644
--- a/examples/imgui/main.cpp
+++ b/examples/imgui/main.cpp
@@ -403,12 +403,10 @@ public:
 			vertexBuffer.destroy();
 			VK_CHECK_RESULT(device->createBuffer(VK_BUFFER_USAGE_VERTEX_BUFFER_BIT, VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT, &vertexBuffer, vertexBufferSize));
 			vertexCount = imDrawData->TotalVtxCount;
-			vertexBuffer.unmap();
 			vertexBuffer.map();
 		}
 
 		// Index buffer
-		VkDeviceSize indexSize = imDrawData->TotalIdxCount * sizeof(ImDrawIdx);
 		if ((indexBuffer.buffer == VK_NULL_HANDLE) || (indexCount < imDrawData->TotalIdxCount)) {
 			indexBuffer.unmap();
 			indexBuffer.destroy();