diff --git a/mode/c.py b/mode/c.py
index 3727ba0..4eb54ea 100644
--- a/mode/c.py
+++ b/mode/c.py
@@ -116,7 +116,7 @@ class CTabber2(tab.StackTabber2):
         return t.name == 'spaces'
     def _is_ignored(self, t):
         if t.name in ('spaces', 'eol', 'comment'): return True
-        elif t.fqname() in ('comment.start', 'comment.null', 'comment.end'): return True
+        elif t.fqname() in ('comment.start', 'comment.data', 'comment.null', 'comment.end'): return True
         else: return False
 
 class CCheckSyntax(method.shell.Exec):