Index: ram/etidin.c
===================================================================
--- ram/etidin.c	(revision 7c0efb63f7606b398c82dd50474b0d8e64ae0799)
+++ ram/etidin.c	(revision a8c6a0ede616187512b11f5f0ace304da10aab8b)
@@ -158,8 +158,8 @@
 
 	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';