diff --git a/src/core/hle/service/nvdrv/devices/nvhost_ctrl_gpu.h b/src/core/hle/service/nvdrv/devices/nvhost_ctrl_gpu.h
index fb02679d79..fe6c2ba79a 100644
--- a/src/core/hle/service/nvdrv/devices/nvhost_ctrl_gpu.h
+++ b/src/core/hle/service/nvdrv/devices/nvhost_ctrl_gpu.h
@@ -21,7 +21,7 @@ public:
     u32 ioctl(u32 command, const std::vector<u8>& input, std::vector<u8>& output) override;
 
 private:
-    enum class IoctlCommand {
+    enum class IoctlCommand : u32 {
         IocGetCharacteristicsCommand = 0xC0B04705,
         IocGetTPCMasksCommand = 0xC0184706,
         IocGetActiveSlotMaskCommand = 0x80084714,