diff --git a/lib/DBIx/Class/Relationship/Base.pm b/lib/DBIx/Class/Relationship/Base.pm
index b7e74eb58..9881477ba 100644
--- a/lib/DBIx/Class/Relationship/Base.pm
+++ b/lib/DBIx/Class/Relationship/Base.pm
@@ -527,7 +527,9 @@ sub related_resultset {
   my $rsrc = $self->result_source;
 
   my $rel_info = $rsrc->relationship_info($rel)
-    or $self->throw_exception( "No such relationship '$rel'" );
+    or $self->throw_exception(
+      "No such relationship '$rel' on '@{[ $rsrc->source_name ]}' source"
+    );
 
   my $relcond_is_freeform = ref $rel_info->{cond} eq 'CODE';