diff --git a/libsrc/telestrat/clrscr.s b/libsrc/telestrat/clrscr.s
index 52f34dcab..2adc905b1 100644
--- a/libsrc/telestrat/clrscr.s
+++ b/libsrc/telestrat/clrscr.s
@@ -34,7 +34,7 @@
     dex
     stx     SCRX
     
-    lda     #$FF
+    dex
     sta     OLD_BGCOLOR
     sta     OLD_CHARCOLOR