diff --git a/src/Spec2-Adapters-Morphic/SpStyleEnvironmentColorProxy.class.st b/src/Spec2-Adapters-Morphic/SpStyleEnvironmentColorProxy.class.st
index 0697a892..1b7ccd8d 100644
--- a/src/Spec2-Adapters-Morphic/SpStyleEnvironmentColorProxy.class.st
+++ b/src/Spec2-Adapters-Morphic/SpStyleEnvironmentColorProxy.class.st
@@ -16,6 +16,12 @@ Class {
 	#tag : 'StyleSheet'
 }
 
+{ #category : 'accessing' }
+SpStyleEnvironmentColorProxy >> asCollectionElement [
+	"Necessary since Fuel uses identity collections to store references."
+	^ self
+]
+
 { #category : 'converting' }
 SpStyleEnvironmentColorProxy >> asStyleVariable [
 
@@ -34,6 +40,12 @@ SpStyleEnvironmentColorProxy >> doesNotUnderstand: aMessage [
 	^ aMessage sendTo: (Smalltalk ui theme perform: colorSelector)
 ]
 
+{ #category : 'accessing' }
+SpStyleEnvironmentColorProxy >> enclosedElement [
+	"Necessary since Fuel uses identity collections to store references."
+	^ self
+]
+
 { #category : 'hooks' }
 SpStyleEnvironmentColorProxy >> fuelAccept: aGeneralMapper [