diff --git a/mis_builder/models/mis_report_style.py b/mis_builder/models/mis_report_style.py
index 4563844ff..cd4327fd7 100644
--- a/mis_builder/models/mis_report_style.py
+++ b/mis_builder/models/mis_report_style.py
@@ -84,7 +84,6 @@ def check_positive_val(self):
     }
 
     # style name
-    # TODO enforce uniqueness
     name = fields.Char(string="Style name", required=True)
 
     # color
@@ -133,6 +132,10 @@ def check_positive_val(self):
     hide_always_inherit = fields.Boolean(default=True)
     hide_always = fields.Boolean(default=False)
 
+    _sql_constraints = [
+        ("style_name_event_uniq", "unique(name)", "Style name should be unique")
+    ]
+
     @api.model
     def merge(self, styles):
         """Merge several styles, giving priority to the last.