--- st.c
+++ st.c
@@ -1848,21 +1850,22 @@ strhandle(void)
 	int j, narg, par;
 
 	term.esc &= ~(ESC_STR_END|ESC_STR);
-	strparse();
-	par = (narg = strescseq.narg) ? atoi(strescseq.args[0]) : 0;
+	strescseq.buf[strescseq.len] = '\0';
 
 	switch (strescseq.type) {
 	case ']': /* OSC -- Operating System Command */
+		strparse();
+		par = (narg = strescseq.narg) ? atoi(STRESCARGJUST(0)) : 0;
 		switch (par) {
 		case 0:
 		case 1:
 		case 2:
 			if (narg > 1)
-				xsettitle(strescseq.args[1]);
+				xsettitle(STRESCARGREST(1));
 			return;
 		case 52:
 			if (narg > 2 && allowwindowops) {
-				dec = base64dec(strescseq.args[2]);
+				dec = base64dec(STRESCARGJUST(2));
 				if (dec) {
 					xsetsel(dec);
 					xclipcopy();
@@ -1894,7 +1897,7 @@ strhandle(void)
 		}
 		break;
 	case 'k': /* old title set compatibility */
-		xsettitle(strescseq.args[0]);
+		xsettitle(strescseq.buf);
 		return;
 	case 'P': /* DCS -- Device Control String */
 	case '_': /* APC -- Application Program Command */