diff --git a/terraform/transform_reference.go b/terraform/transform_reference.go
index 1727132ef..5dff1a0ba 100644
--- a/terraform/transform_reference.go
+++ b/terraform/transform_reference.go
@@ -293,7 +293,7 @@ func (m *ReferenceMap) mapKey(path addrs.Module, addr addrs.Referenceable) strin
 // referenced. This is the path that its results from ReferenceableAddrs
 // are considered to be relative to.
 //
-// Only GraphNodeModuleInstance implementations can be referenced, so this method will
+// Only GraphNodeModulePath implementations can be referenced, so this method will
 // panic if the given vertex does not implement that interface.
 func vertexReferenceablePath(v dag.Vertex) addrs.Module {
 	sp, ok := v.(GraphNodeModulePath)
@@ -316,7 +316,7 @@ func vertexReferenceablePath(v dag.Vertex) addrs.Module {
 // vertexReferencePath returns the path in which references _from_ the given
 // vertex must be interpreted.
 //
-// Only GraphNodeModuleInstance implementations can have references, so this method
+// Only GraphNodeModulePath implementations can have references, so this method
 // will panic if the given vertex does not implement that interface.
 func vertexReferencePath(v dag.Vertex) addrs.Module {
 	sp, ok := v.(GraphNodeModulePath)
@@ -344,7 +344,7 @@ func vertexReferencePath(v dag.Vertex) addrs.Module {
 // The result is an opaque string that includes both the address of the given
 // object and the address of the module instance that object belongs to.
 //
-// Only GraphNodeModuleInstance implementations can be referrers, so this method will
+// Only GraphNodeModulePath implementations can be referrers, so this method will
 // panic if the given vertex does not implement that interface.
 func (m *ReferenceMap) referenceMapKey(referrer dag.Vertex, addr addrs.Referenceable) string {
 	path := vertexReferencePath(referrer)