diff --git a/src/graphics/guest_gpu/gpu_format.cpp b/src/graphics/guest_gpu/gpu_format.cpp
index 8a89bdbe2..4413480ed 100644
--- a/src/graphics/guest_gpu/gpu_format.cpp
+++ b/src/graphics/guest_gpu/gpu_format.cpp
@@ -10,9 +10,9 @@ namespace {
 
 struct FormatInfo {
 	BufferFormat       format;
-	uint32_t           bytes_per_element;
-	uint32_t           block_compressed_bytes_per_block;
-	uint32_t           render_target_bytes_per_element;
+	uint8_t            bytes_per_element;
+	uint8_t            block_compressed_bytes_per_block;
+	uint8_t            render_target_bytes_per_element;
 	bool               sampled_texture;
 	bool               uint_texture;
 	bool               sint_texture = false;