diff --git a/py/compile.c b/py/compile.c
index 3b6a264d61..86ec4d3a3c 100644
--- a/py/compile.c
+++ b/py/compile.c
@@ -2308,6 +2308,10 @@ STATIC void compile_trailer_paren_helper(compiler_t *comp, mp_parse_node_t pn_ar
             }
         } else {
             normal_argument:
+            if (star_flags) {
+                compile_syntax_error(comp, args[i], "non-keyword arg after */**");
+                return;
+            }
             if (n_keyword > 0) {
                 compile_syntax_error(comp, args[i], "non-keyword arg after keyword arg");
                 return;
diff --git a/tests/basics/python34.py b/tests/basics/python34.py
index a23f347d64..d5cc59ad6c 100644
--- a/tests/basics/python34.py
+++ b/tests/basics/python34.py
@@ -20,6 +20,8 @@ def test_syntax(code):
         print("SyntaxError")
 test_syntax("f(*a, *b)") # can't have multiple * (in 3.5 we can)
 test_syntax("f(**a, **b)") # can't have multiple ** (in 3.5 we can)
+test_syntax("f(*a, b)") # can't have positional after *
+test_syntax("f(**a, b)") # can't have positional after **
 test_syntax("() = []") # can't assign to empty tuple (in 3.6 we can)
 test_syntax("del ()") # can't delete empty tuple (in 3.6 we can)
 
diff --git a/tests/basics/python34.py.exp b/tests/basics/python34.py.exp
index f497df3b80..590fc364f4 100644
--- a/tests/basics/python34.py.exp
+++ b/tests/basics/python34.py.exp
@@ -7,5 +7,7 @@ SyntaxError
 SyntaxError
 SyntaxError
 SyntaxError
+SyntaxError
+SyntaxError
 3.4
 3 4