Index: ram/etivce.c
===================================================================
--- ram/etivce.c	(revision 6bbd7791cad28d3cc69b459232222c1e049b03fd)
+++ ram/etivce.c	(revision a95b757fca7579e74c82ae405ffb887af13219f8)
@@ -85,8 +85,8 @@
 
 	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';