diff --git a/src/conio/ciolib.c b/src/conio/ciolib.c
index 03d2863421a91c1285ad91210c986c089117158f..762b4574aeae58f7c8f801ce9fae2d15811525a0 100644
--- a/src/conio/ciolib.c
+++ b/src/conio/ciolib.c
@@ -695,6 +695,8 @@ CIOLIBEXPORT void CIOLIBCALL ciolib_textmode(int mode)
 		lastmode=cio_textinfo.currmode;
 	}
 	else {
+		if(mode==64)
+			mode=C80X50;
 		lastmode=cio_textinfo.currmode;
 		cio_api.textmode(mode);
 	}