diff --git a/.gitignore b/.gitignore
index 5761abc..fcbb289 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,2 @@
 *.o
+dc
diff --git a/dc.c b/dc.c
index 1021b29..57e1031 100644
--- a/dc.c
+++ b/dc.c
@@ -189,8 +189,10 @@ dcevaln(ns_t * s, char * eval, size_t len)
     case ':': REGCHAR(); REGCLAMP(); ns_reg_push_index(s, c); break;
     case ';': REGCHAR(); REGCLAMP(); ns_reg_pop_index(s, c); break;
     case '!': i += command(eval + i + 1); break;
+#if 0
     case '?': /* take user input, and execute that
                  as a slave to current level */ break;
+#endif /* 0 */
     /* New non-conflicting features not present in DC */
     case '@': ns_abs(s); break;
     case '"': ns_ceil(s); break;