--- a/netwerk/cache/nsDiskCacheEntry.h
+++ b/netwerk/cache/nsDiskCacheEntry.h
@@ -27,17 +27,17 @@ struct nsDiskCacheEntry {
     uint32_t        mMetaDataSize;  // includes terminating null byte
     // followed by key data (mKeySize bytes)
     // followed by meta data (mMetaDataSize bytes)
 
     uint32_t        Size()    { return sizeof(nsDiskCacheEntry) +
                                     mKeySize + mMetaDataSize;
                               }
 
-    char*           Key()     { return reinterpret_cast<char*const>(this) +
+    char*           Key()     { return reinterpret_cast<char*>(this) +
                                     sizeof(nsDiskCacheEntry);
                               }
 
     char*           MetaData()
                               { return Key() + mKeySize; }
 
     nsCacheEntry *  CreateCacheEntry(nsCacheDevice *  device);