Index: ram/etipnt.c
===================================================================
--- ram/etipnt.c	(revision a95b757fca7579e74c82ae405ffb887af13219f8)
+++ ram/etipnt.c	(revision 7c0efb63f7606b398c82dd50474b0d8e64ae0799)
@@ -137,8 +137,8 @@
 
 	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';