diff --git a/src/Hash2Pub/FediChordTypes.hs b/src/Hash2Pub/FediChordTypes.hs
index 47b2004..27d5f32 100644
--- a/src/Hash2Pub/FediChordTypes.hs
+++ b/src/Hash2Pub/FediChordTypes.hs
@@ -256,10 +256,10 @@ type NodeCache = RingMap CacheEntry
 -- | generic data structure for holding elements with a key and modular lookup
 newtype RingMap a = RingMap { getRingMap :: HasKeyID a => Map.Map NodeID (RingEntry a) }
 
-instance Eq (RingMap a) where
+instance (HasKeyID a) => Eq (RingMap a) where
     a == b = getRingMap a == getRingMap b
 
-instance Show (RingMap a) where
+instance (HasKeyID a) => Show (RingMap a) where
     show rmap = shows (getRingMap rmap) "RingMap "
 
 -- | entry of a 'RingMap' that holds a value and can also