Index: ram/etaint.c
===================================================================
--- ram/etaint.c	(revision e15f784634a4dac964c4d984cb5d11f465b9ce36)
+++ ram/etaint.c	(revision 99fed2e8f3fa1e05758085f57b76b6fe5f056e09)
@@ -83,8 +83,8 @@
 	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';