1 files changed, 1 insertions, 1 deletions
diff --git a/numpy/f2py/f2py2e.py b/numpy/f2py/f2py2e.py
index 98f58e333..64c13fff0 100755
--- a/numpy/f2py/f2py2e.py
+++ b/numpy/f2py/f2py2e.py
@@ -339,7 +339,7 @@ def dict_append(d_out,d_in):
     for (k,v) in d_in.items():
         if k not in d_out:
             d_out[k] = []
-        if type(v) is list:
+        if isinstance(v, list):
             d_out[k] = d_out[k] + v
         else:
             d_out[k].append(v)