diff --git a/engines/zvision/zfs_archive.h b/engines/zvision/zfs_archive.h
index e683ac1b535..3bf492578c3 100644
--- a/engines/zvision/zfs_archive.h
+++ b/engines/zvision/zfs_archive.h
@@ -52,7 +52,7 @@ struct ZfsEntryHeader {
 	uint32 unknown;
 };
 
-typedef Common::HashMap<Common::String, ZfsEntryHeader*> ZfsEntryHeaderMap;
+typedef Common::HashMap<Common::String, ZfsEntryHeader*, Common::IgnoreCase_Hash, Common::IgnoreCase_EqualTo> ZfsEntryHeaderMap;
 
 class ZfsArchive : public Common::Archive {
 public: