diff --git a/src/Fame-Core/FM3Class.class.st b/src/Fame-Core/FM3Class.class.st
index fb0a2416..e162848d 100644
--- a/src/Fame-Core/FM3Class.class.st
+++ b/src/Fame-Core/FM3Class.class.st
@@ -171,13 +171,6 @@ FM3Class >> isFM3Class [
 	^ true
 ]
 
-{ #category : 'testing' }
-FM3Class >> isPrimitive [
-	<FMProperty: #primitive type: #Boolean defaultValue: false>
-	<derived>
-	^ false
-]
-
 { #category : 'testing' }
 FM3Class >> isRoot [
 	<FMProperty: #root type: #Boolean defaultValue: false>
diff --git a/src/Fame-Core/FM3Trait.class.st b/src/Fame-Core/FM3Trait.class.st
index 5fcb67f2..7e75c54d 100644
--- a/src/Fame-Core/FM3Trait.class.st
+++ b/src/Fame-Core/FM3Trait.class.st
@@ -113,14 +113,6 @@ FM3Trait >> isFM3Trait [
 	^ true
 ]
 
-{ #category : 'testing' }
-FM3Trait >> isPrimitive [
-
-	<FMProperty: #primitive type: #Boolean defaultValue: false>
-	<derived>
-	^ false
-]
-
 { #category : 'testing' }
 FM3Trait >> isRoot [
 
diff --git a/src/Fame-Core/FM3Type.class.st b/src/Fame-Core/FM3Type.class.st
index 09328c92..6dc41f28 100644
--- a/src/Fame-Core/FM3Type.class.st
+++ b/src/Fame-Core/FM3Type.class.st
@@ -82,6 +82,13 @@ FM3Type >> initialize [
 	traits := Set new
 ]
 
+{ #category : 'testing' }
+FM3Type >> isPrimitive [
+	<FMProperty: #primitive type: #Boolean defaultValue: false>
+	<derived>
+	^ false
+]
+
 { #category : 'accessing' }
 FM3Type >> package [
 	<FMProperty: #package type: #FM3Package opposite: #classes>