diff --git a/lib/spack/spack/cmd/uninstall.py b/lib/spack/spack/cmd/uninstall.py
index 2757d5d232e..f03270d06d5 100644
--- a/lib/spack/spack/cmd/uninstall.py
+++ b/lib/spack/spack/cmd/uninstall.py
@@ -26,7 +26,8 @@
 
 error_message = """You can either:
     a) use a more specific spec, or
-    b) use `spack uninstall --all` to uninstall ALL matching specs.
+    b) specify the package by its hash (e.g. `spack uninstall /hash`), or
+    c) use `spack uninstall --all` to uninstall ALL matching specs.
 """
 
 # Arguments for display_specs when we find ambiguity