diff --git a/src/Magnum/Vk/Buffer.cpp b/src/Magnum/Vk/Buffer.cpp
index 4aed61f9e..ae7f7a8dd 100644
--- a/src/Magnum/Vk/Buffer.cpp
+++ b/src/Magnum/Vk/Buffer.cpp
@@ -48,7 +48,7 @@ Buffer& Buffer::update(Queue& queue, CommandPool& pool, const void* sourceData,
     std::unique_ptr<Vk::CommandBuffer> copyToDeviceCmds = pool.allocateCommandBuffer(Vk::CommandBuffer::Level::Primary);
 
     /* plane vertices */
-    Buffer stagingBuffer{*_device, size, Vk::BufferUsage::TransferSrc};
+    Buffer stagingBuffer{*_device, UnsignedInt(size), Vk::BufferUsage::TransferSrc};
     std::unique_ptr<DeviceMemory> stagingMemory = stagingBuffer.allocateDeviceMemory(Vk::MemoryProperty::HostVisible);
 
     Containers::ArrayView<char> data = stagingMemory->map(destOffset, size);
diff --git a/src/Magnum/Vk/Command.h b/src/Magnum/Vk/Command.h
index 25988f9fd..bd7422e06 100644
--- a/src/Magnum/Vk/Command.h
+++ b/src/Magnum/Vk/Command.h
@@ -71,7 +71,7 @@ inline auto setScissor(UnsignedInt firstScissor, const std::initializer_list<Ran
 
         UnsignedInt i = 0;
         for(auto& range: ranges) {
-            vkRects[i] = {{range.left(), range.bottom()}, {range.sizeX(), range.sizeY()}};
+            vkRects[i] = {{range.left(), range.bottom()}, {UnsignedInt(range.sizeX()), UnsignedInt(range.sizeY())}};
             ++i;
         }
         vkCmdSetScissor(cmdBuffer, firstScissor, vkRects.size(), vkRects.data());
diff --git a/src/Magnum/Vk/CommandBuffer.h b/src/Magnum/Vk/CommandBuffer.h
index ba16b6a61..d6dd2c376 100644
--- a/src/Magnum/Vk/CommandBuffer.h
+++ b/src/Magnum/Vk/CommandBuffer.h
@@ -151,7 +151,7 @@ class MAGNUM_VK_EXPORT CommandBuffer {
                 nullptr,
                 renderPass,
                 framebuffer,
-                VkRect2D{{renderArea.left(), renderArea.bottom()}, {renderArea.sizeX(), renderArea.sizeY()}},
+                VkRect2D{{renderArea.left(), renderArea.bottom()}, {UnsignedInt(renderArea.sizeX()), UnsignedInt(renderArea.sizeY())}},
                 clearValues.size(),
                 clearValues.data()};
 
diff --git a/src/Magnum/Vk/Pipeline.h b/src/Magnum/Vk/Pipeline.h
index b9e52d394..da7ea9f92 100644
--- a/src/Magnum/Vk/Pipeline.h
+++ b/src/Magnum/Vk/Pipeline.h
@@ -234,7 +234,7 @@ class MAGNUM_VK_EXPORT GraphicsPipelineBuilder {
                 VK_BLEND_OP_ADD,
                 VK_BLEND_FACTOR_ZERO, VK_BLEND_FACTOR_ZERO,
                 VK_BLEND_OP_ADD,
-                0xf
+                UnsignedInt(0xf)
             };
             _blendAttachments.push_back(blendAttachmentState);
 
@@ -244,7 +244,7 @@ class MAGNUM_VK_EXPORT GraphicsPipelineBuilder {
                 0,
                 VK_FALSE,
                 VK_LOGIC_OP_CLEAR,
-                _blendAttachments.size(),
+                UnsignedInt(_blendAttachments.size()),
                 _blendAttachments.data(),
                 {0.0f, 0.0f, 0.0f, 0.0f}
             };