diff --git a/st.c b/st.c
index 5312a2f..161a247 100644
--- a/st.c
+++ b/st.c
@@ -1692,6 +1692,7 @@ tsetmode(int priv, int set, int *args, int narg)
 			case 1015: /* urxvt mangled mouse mode; incompatible
 				      and can be mistaken for other control
 				      codes. */
+				break;
 			default:
 				fprintf(stderr,
 					"erresc: unknown private set/reset mode %d\n",