Index: ram/etwvce.c
===================================================================
--- ram/etwvce.c	(revision 7b254502bf87d742b762f7116abc7396e6ee4086)
+++ ram/etwvce.c	(revision 8aad29e0c3cb4f9bfbc929318dd9e61996aa3a9c)
@@ -83,8 +83,8 @@
 	n = nn & 0xFF;
 	ec = stccol - cfetp->flcol;	/* setup edit buffer column */
-	ebuf[ec] = k + '0';
+	ebuf[ec] = (int8_t)(k + '0');
 	ebuf[2] = '\0';
 
-	dspbuf[0] = k + '0';
+	dspbuf[0] = (int8_t)(k + '0');
 	dspbuf[1] = '\0';