diff --git a/.idea/vcs.xml b/.idea/vcs.xml
new file mode 100644
index 0000000..94a25f7
--- /dev/null
+++ b/.idea/vcs.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="$PROJECT_DIR$" vcs="Git" />
+  </component>
+</project>
\ No newline at end of file
diff --git a/fissix/fixes/fix_except.py b/fissix/fixes/fix_except.py
index 3f710c6..c1af9df 100644
--- a/fissix/fixes/fix_except.py
+++ b/fissix/fixes/fix_except.py
@@ -56,8 +56,9 @@ def transform(self, node, results):
         for except_clause, e_suite in find_excepts(try_cleanup):
             if len(except_clause.children) == 4:
                 (E, comma, N) = except_clause.children[1:4]
-                comma.replace(Name("as", prefix=" "))
-                changed = True
+                if ',' in comma.value:
+                    comma.replace(Name("as", prefix=" "))
+                    changed = True
 
                 if N.type != token.NAME:
                     # Generate a new N for the except clause
diff --git a/fissix/tests/data/fixers/fixer_except.py b/fissix/tests/data/fixers/fixer_except.py
new file mode 100644
index 0000000..e69de29