diff --git a/src/mli.a b/src/mli.a
index bd3eb68..6dec565 100755
--- a/src/mli.a
+++ b/src/mli.a
@@ -599,8 +599,8 @@ WriteRAMToDisk
          clc
 
 .exit
-         lda   #TRUE
-         sta   gUsingRAMDisk
+         ldx   #TRUE
+         stx   gUsingRAMDisk
          rts
 
 .cancel