diff --git a/base/VulkanDevice.hpp b/base/VulkanDevice.hpp
index 4d4b0825..9289ec9a 100644
--- a/base/VulkanDevice.hpp
+++ b/base/VulkanDevice.hpp
@@ -414,6 +414,9 @@ namespace vks
 			{
 				VK_CHECK_RESULT(buffer->map());
 				memcpy(buffer->mapped, data, size);
+				if ((memoryPropertyFlags & VK_MEMORY_PROPERTY_HOST_COHERENT_BIT) == 0)
+					buffer->flush();
+
 				buffer->unmap();
 			}