diff --git a/Runtime/Graphics/CTextureBoo.cpp b/Runtime/Graphics/CTextureBoo.cpp
index 8e01d4e14..f4c846cb6 100644
--- a/Runtime/Graphics/CTextureBoo.cpp
+++ b/Runtime/Graphics/CTextureBoo.cpp
@@ -26,22 +26,22 @@ struct DXT1Block {
 /* GX uses this upsampling technique to extract full 8-bit range */
 constexpr u8 Convert3To8(u8 v) {
   /* Swizzle bits: 00000123 -> 12312312 */
-  return (v << 5) | (v << 2) | (v >> 1);
+  return static_cast<u8>((u32{v} << 5) | (u32{v} << 2) | (u32{v} >> 1));
 }
 
 constexpr u8 Convert4To8(u8 v) {
   /* Swizzle bits: 00001234 -> 12341234 */
-  return (v << 4) | v;
+  return static_cast<u8>((u32{v} << 4) | u32{v});
 }
 
 constexpr u8 Convert5To8(u8 v) {
   /* Swizzle bits: 00012345 -> 12345123 */
-  return (v << 3) | (v >> 2);
+  return static_cast<u8>((u32{v} << 3) | (u32{v} >> 2));
 }
 
 constexpr u8 Convert6To8(u8 v) {
   /* Swizzle bits: 00123456 -> 12345612 */
-  return (v << 2) | (v >> 4);
+  return static_cast<u8>((u32{v} << 2) | (u32{v} >> 4));
 }
 } // Anonymous namespace