diff --git a/jedi/evaluate/finder.py b/jedi/evaluate/finder.py
index 4a167ee2..11b087be 100644
--- a/jedi/evaluate/finder.py
+++ b/jedi/evaluate/finder.py
@@ -553,7 +553,7 @@ def check_tuple_assignments(types, name):
                 debug.warning("Invalid tuple lookup #%s of result %s in %s",
                               index, types, name)
             else:
-                if r.type == 'dict':
+                if isinstance(r, iterable.Array) and r.type == 'dict':
                     continue
                 try:
                     new_types |= func(index)
diff --git a/test/completion/isinstance.py b/test/completion/isinstance.py
index e44312f5..008a1039 100644
--- a/test/completion/isinstance.py
+++ b/test/completion/isinstance.py
@@ -55,6 +55,13 @@ a
 fooooo2('')
 
 
+def isinstance_func(arr):
+    for value in arr:
+        if isinstance(value, dict):
+            # Shouldn't fail, even with the dot.
+            #? 17 dict()
+            value.
+
 # -----------------
 # Names with multiple indices.
 # -----------------