diff --git a/flanker/mime/message/headers/parametrized.py b/flanker/mime/message/headers/parametrized.py
index 710a032b..807e5f85 100644
--- a/flanker/mime/message/headers/parametrized.py
+++ b/flanker/mime/message/headers/parametrized.py
@@ -98,6 +98,8 @@ def concatenate(parts):
     if is_old_style(part):
         # old-style parameters do not support any continuations
         return encodedword.mime_to_unicode(get_value(part))
+    elif is_single_part(part):
+        return decode_new_style(part)
     else:
         return u"".join(
             decode_new_style(p) for p in partition(parts))
@@ -225,6 +227,10 @@ def is_encoded(part):
     return part[1][2] == '*'
 
 
+def is_single_part(part):
+    return part[1][1] is None
+
+
 def get_key(parameter):
     if is_old_style(parameter):
         return parameter[1].lower()
diff --git a/tests/mime/message/headers/parametrized_test.py b/tests/mime/message/headers/parametrized_test.py
index 7e69666b..0054e7d3 100644
--- a/tests/mime/message/headers/parametrized_test.py
+++ b/tests/mime/message/headers/parametrized_test.py
@@ -64,5 +64,10 @@ def content_types_test():
     eq_(('multipart/mixed', {'boundary': 'Alternative_Boundary_8dJn:mu0M2Yt5KaFZ8AdJn:mu0M2=Yt1KaFdA'}), parametrized.decode(''' multipart/mixed; \n\tboundary="Alternative_Boundary_8dJn:mu0M2Yt5KaFZ8AdJn:mu0M2=Yt1KaFdA"'''))
     eq_(('multipart/mixed', {'boundary': '16819560-2078917053-688350843:#11603'}), parametrized.decode('''MULTIPART/MIXED;BOUNDARY="16819560-2078917053-688350843:#11603"'''))
 
+
 def content_type_param_with_spaces_test():
-    eq_(('multipart/alternative',{'boundary':'nextPart'}), parametrized.decode("multipart/alternative; boundary = nextPart"))
+    eq_(('multipart/alternative', {'boundary': 'nextPart'}), parametrized.decode("multipart/alternative; boundary = nextPart"))
+
+
+def content_type_same_param_name_encoded_unencoded_test():
+    eq_(('application/pdf', {'name': '30676_2015.pdf'}), parametrized.decode("application/pdf; name=30676_2015.pdf;name*=iso-8859-1''%33%30%36%37%36%5F%32%30%31%35%2E%70%64%66"))