diff --git a/renderdoc/driver/vulkan/vk_msaa_buffer_conv.cpp b/renderdoc/driver/vulkan/vk_msaa_buffer_conv.cpp
index 0296fc5a7..86080c4f4 100644
--- a/renderdoc/driver/vulkan/vk_msaa_buffer_conv.cpp
+++ b/renderdoc/driver/vulkan/vk_msaa_buffer_conv.cpp
@@ -161,7 +161,7 @@ void VulkanDebugManager::CopyTex2DMSToBuffer(VkCommandBuffer cmd, VkBuffer destB
 
         Vec4u params[2] = {
             {extent.width, currentSlice, currentSample, bs},
-            {maxInvoc, dispatchOffset & 0xffffffffU, 0, 0},
+            {maxInvoc, uint32_t(dispatchOffset & 0xffffffffU), 0, 0},
         };
 
         ObjDisp(cmd)->CmdPushConstants(Unwrap(cmd), Unwrap(m_BufferMSPipeLayout),
@@ -366,7 +366,7 @@ void VulkanDebugManager::CopyDepthTex2DMSToBuffer(VkCommandBuffer cmd, VkBuffer
 
       Vec4u params[2] = {
           {extent.width, currentSlice, currentSample, fmtIndex},
-          {maxInvoc, dispatchOffset & 0xffffffffU, 0, 0},
+          {maxInvoc, uint32_t(dispatchOffset & 0xffffffffU), 0, 0},
       };
 
       ObjDisp(cmd)->CmdPushConstants(Unwrap(cmd), Unwrap(m_BufferMSPipeLayout), VK_SHADER_STAGE_ALL,
@@ -528,7 +528,7 @@ void VulkanDebugManager::CopyBufferToTex2DMS(VkCommandBuffer cmd, VkImage destMS
 
         Vec4u params[2] = {
             {extent.width, currentSlice, currentSample, bs},
-            {maxInvoc, dispatchOffset & 0xffffffffU, 0, 0},
+            {maxInvoc, uint32_t(dispatchOffset & 0xffffffffU), 0, 0},
         };
 
         ObjDisp(cmd)->CmdPushConstants(Unwrap(cmd), Unwrap(m_BufferMSPipeLayout),
diff --git a/renderdoc/driver/vulkan/vk_shaderdebug.cpp b/renderdoc/driver/vulkan/vk_shaderdebug.cpp
index 182d508ff..dbdaa3329 100644
--- a/renderdoc/driver/vulkan/vk_shaderdebug.cpp
+++ b/renderdoc/driver/vulkan/vk_shaderdebug.cpp
@@ -1734,7 +1734,7 @@ private:
           const uint32_t numSlices = imageProps.type == VK_IMAGE_TYPE_3D ? 1 : data.depth;
           const uint32_t numSamples = (uint32_t)imageProps.samples;
 
-          data.bytes.reserve(data.samplePitch * numSamples);
+          data.bytes.reserve(size_t(data.samplePitch * numSamples));
 
           // defaults are fine - no interpretation. Maybe we could use the view's typecast?
           const GetTextureDataParams params = GetTextureDataParams();
@@ -4006,7 +4006,7 @@ ShaderDebugTrace *VulkanReplay::DebugVertex(uint32_t eventId, uint32_t vertid, u
 
     bytebuf data;
 
-    size_t size = GetByteSize(1, 1, 1, attr.format, 0);
+    size_t size = (size_t)GetByteSize(1, 1, 1, attr.format, 0);
 
     bool found = false;