diff --git a/src/dynarec/rv64/rv64_prolog.S b/src/dynarec/rv64/rv64_prolog.S
index 9a780bd62d..3eed0816d0 100644
--- a/src/dynarec/rv64/rv64_prolog.S
+++ b/src/dynarec/rv64/rv64_prolog.S
@@ -28,7 +28,7 @@ rv64_prolog:
     fsd     f20, (15*8)(sp)
     fsd     f21, (16*8)(sp)
     fsd     f22, (17*8)(sp)
-    fsd     f23, (19*8)(sp)
+    fsd     f23, (18*8)(sp)
     fsd     f24, (19*8)(sp)
     fsd     f25, (20*8)(sp)
     fsd     f26, (21*8)(sp)