diff --git a/pmodules_tools/db_diff/check.py b/pmodules_tools/db_diff/check.py
index 896ca83e..cc98c639 100644
--- a/pmodules_tools/db_diff/check.py
+++ b/pmodules_tools/db_diff/check.py
@@ -102,7 +102,7 @@ def db_check_diff(current_pmodule_state, Pmodules_db_path, Pmodules_states):
         )
         old_db = set(" ".join(i.split()) for i in old_pmodule_state.splitlines())
         all_module_list = list(current_db)
-        all_module_list_sorted = sorted([x for x in all_module_list if "stable" in x])
+        all_module_list_sorted = sorted([x for x in all_module_list if " stable" in x])
         all_module_list_sorted += sorted(
             [x for x in all_module_list if "unstable" in x]
         )