diff --git a/src/dxgi/dxgi_adapter.cpp b/src/dxgi/dxgi_adapter.cpp
index 662a61f3f..10a6215b5 100644
--- a/src/dxgi/dxgi_adapter.cpp
+++ b/src/dxgi/dxgi_adapter.cpp
@@ -161,7 +161,7 @@ namespace dxvk {
     // Convert device name
     std::memset(pDesc->Description, 0, sizeof(pDesc->Description));
     ::MultiByteToWideChar(CP_UTF8, 0, deviceProp.deviceName, -1,
-        pDesc->Description, sizeof(pDesc->Description));
+        pDesc->Description, sizeof(pDesc->Description) / sizeof(*pDesc->Description));
     
     // Get amount of video memory
     // based on the Vulkan heaps