diff --git a/src/rp.c b/src/rp.c
index 09eed92ef..1e203b398 100644
--- a/src/rp.c
+++ b/src/rp.c
@@ -30,8 +30,6 @@ static const char grp_op_nop[] =
   RULE_OP_MANGLE_SWITCH_LAST,
   RULE_OP_MANGLE_DUPECHAR_ALL,
   RULE_OP_MANGLE_TITLE,
-  RULE_OP_MANGLE_APPEND_MEMORY,
-  RULE_OP_MANGLE_PREPEND_MEMORY,
 };
 
 static const char grp_op_pos_p0[] =
@@ -85,11 +83,6 @@ static const char grp_op_pos_pos1[] =
   RULE_OP_MANGLE_OMIT
 };
 
-static const char grp_op_pos1_pos2_pos3[] =
-{
-  RULE_OP_MANGLE_EXTRACT_MEMORY
-};
-
 static const char grp_pos[] =
 {
   '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B'
@@ -227,17 +220,6 @@ int generate_random_rule (char rule_buf[RP_RULE_BUFSIZ], const u32 rp_gen_func_m
         p2 = get_random_num (1, sizeof (grp_pos));
         rule_buf[rule_pos++] = grp_pos[p2];
         break;
-
-      case 8:
-        r = get_random_num (0, sizeof (grp_op_pos1_pos2_pos3));
-        rule_buf[rule_pos++] = grp_op_pos1_pos2_pos3[r];
-        p1 = get_random_num (0, sizeof (grp_pos));
-        rule_buf[rule_pos++] = grp_pos[p1];
-        p2 = get_random_num (1, sizeof (grp_pos));
-        rule_buf[rule_pos++] = grp_pos[p2];
-        p3 = get_random_num (0, sizeof (grp_pos));
-        rule_buf[rule_pos++] = grp_pos[p3];
-        break;
     }
   }