diff --git a/distgit_bugzilla_sync/script.py b/distgit_bugzilla_sync/script.py
index aba8dfb..8cfdbad 100644
--- a/distgit_bugzilla_sync/script.py
+++ b/distgit_bugzilla_sync/script.py
@@ -327,11 +327,13 @@ class BugzillaProxy:
         '''
         # Turn the cclist into something usable by bugzilla
         initial_cc_emails = []
+        initial_cc_emails_lower = []
         initial_cc_fasnames = []
         for watcher in cclist:
             bz_email = self._get_bugzilla_email(watcher)
             if bz_email:
-                initial_cc_emails.append(bz_email.lower())
+                initial_cc_emails.append(bz_email)
+                initial_cc_emails_lower.append(bz_email.lower())
                 initial_cc_fasnames.append(watcher)
             else:
                 self.errors.append(
@@ -345,8 +347,9 @@ class BugzillaProxy:
         # Add owner to the cclist so comaintainers taking over a bug don't
         # have to do this manually
         owner_email = self._get_bugzilla_email(owner)
-        if owner_email not in initial_cc_emails:
-            initial_cc_emails.append(owner_email.lower())
+        if owner_email.lower() not in initial_cc_emails_lower:
+            initial_cc_emails.append(owner_email)
+            initial_cc_emails_lower.append(owner_email.lower())
             initial_cc_fasnames.append(owner)
 
         # Lookup product
@@ -390,7 +393,7 @@ class BugzillaProxy:
                 data['initialcclist'] = initial_cc_emails
             else:
                 for cc_member in product[pkg_key]['initialcclist']:
-                    if cc_member.lower() not in initial_cc_emails:
+                    if cc_member.lower() not in initial_cc_emails_lower:
                         data['initialcclist'] = initial_cc_emails
                         break