diff --git a/desmume/src/arm_jit.cpp b/desmume/src/arm_jit.cpp
index f751e42b3..181d8c523 100644
--- a/desmume/src/arm_jit.cpp
+++ b/desmume/src/arm_jit.cpp
@@ -257,7 +257,7 @@ static GPVar total_cycles;
 
 #ifndef ASMJIT_X64
 #define r64 r32
-#define movsxd mov
+#define movsxd movsx
 #endif
 
 // sequencer.reschedule = true;