diff --git a/core/src/arm7tdmi/arm/exec.rs b/core/src/arm7tdmi/arm/exec.rs
index ed74e47..885b55b 100644
--- a/core/src/arm7tdmi/arm/exec.rs
+++ b/core/src/arm7tdmi/arm/exec.rs
@@ -326,7 +326,7 @@ impl<I: MemoryInterface> Core<I> {
             } else {
                 self.get_reg(dest_reg)
             };
-            if insn.transfer_size() == 1 {
+            if BYTE {
                 self.store_8(addr, value as u8, NonSeq);
             } else {
                 self.store_aligned_32(addr & !0x3, value, NonSeq);