diff --git a/libsrc/apple2/color.s b/libsrc/apple2/color.s
index 6b8c248ee..e83014de7 100644
--- a/libsrc/apple2/color.s
+++ b/libsrc/apple2/color.s
@@ -7,7 +7,7 @@
 ;
 
  	.export		_textcolor, _bgcolor, _bordercolor
-	.import	       	return0, _revers
+	.import	       	return0, return1, _revers
 
 	.include	"apple2.inc"