diff --git a/extmod/re1.5/recursiveloop.c b/extmod/re1.5/recursiveloop.c
index bb337decfb..5c1f37a5a1 100644
--- a/extmod/re1.5/recursiveloop.c
+++ b/extmod/re1.5/recursiveloop.c
@@ -22,6 +22,7 @@ recursiveloop(char *pc, const char *sp, Subject *input, const char **subp, int n
 		case Char:
 			if(*sp != *pc++)
 				return 0;
+                        /* FALLTHROUGH */
 		case Any:
 			sp++;
 			continue;
diff --git a/py/objset.c b/py/objset.c
index b8f0f07ede..45b5c12606 100644
--- a/py/objset.c
+++ b/py/objset.c
@@ -450,6 +450,7 @@ STATIC mp_obj_t set_unary_op(mp_unary_op_t op, mp_obj_t self_in) {
                 return MP_OBJ_NEW_SMALL_INT(hash);
             }
 #endif
+            /* FALLTHROUGH */
         default: return MP_OBJ_NULL; // op not supported
     }
 }