diff --git a/libsrc/tgi/tgi_linepop.s b/libsrc/tgi/tgi_linepop.s
index f0779c5f9..8871f9c36 100644
--- a/libsrc/tgi/tgi_linepop.s
+++ b/libsrc/tgi/tgi_linepop.s
@@ -18,7 +18,7 @@ tgi_linepop:
         sta     ptr3            ; X2
         stx     ptr3+1
         sta     _tgi_curx
-        sta     _tgi_curx+1
+        stx     _tgi_curx+1
         rts