diff --git a/src/dune_pkg/pin.ml b/src/dune_pkg/pin.ml
index 4555f877a40..0cb6cae103a 100644
--- a/src/dune_pkg/pin.ml
+++ b/src/dune_pkg/pin.ml
@@ -86,7 +86,7 @@ module DB = struct
               [ Pp.textf
                   "package %S is defined in more than one source"
                   (Package_name.to_string name)
-              ; Pp.textf "it is also defined in %s" (Loc.to_file_colon_line (fst lhs).loc)
+              ; Pp.textf "it is also defined in %s" (Loc.to_file_colon_line (fst rhs).loc)
               ])
     ; context
     }
diff --git a/test/blackbox-tests/test-cases/pkg/pin-stanza/override-single-workspace.t b/test/blackbox-tests/test-cases/pkg/pin-stanza/override-single-workspace.t
index ad777b9d5f3..bbb5d1862c5 100644
--- a/test/blackbox-tests/test-cases/pkg/pin-stanza/override-single-workspace.t
+++ b/test/blackbox-tests/test-cases/pkg/pin-stanza/override-single-workspace.t
@@ -68,5 +68,5 @@ select a priority:
   4 |  (package (name bar)))
        ^^^^^^^^^^^^^^^^^^^^
   Error: package "bar" is defined in more than one source
-  it is also defined in prj1/dune-project:4
+  it is also defined in prj2/dune-project:4
   [1]