diff --git a/cpp/ql/lib/semmle/code/cpp/Concept.qll b/cpp/ql/lib/semmle/code/cpp/Concept.qll
index 79726b2f16cc..5bac47930c74 100644
--- a/cpp/ql/lib/semmle/code/cpp/Concept.qll
+++ b/cpp/ql/lib/semmle/code/cpp/Concept.qll
@@ -170,9 +170,9 @@ class ConceptIdExpr extends RequirementExpr, @concept_id {
       result = name + "<...>"
     )
     or
-    // The following is for backward compatibility with order databases that
-    // include concept id expressions, but do not include concept template
-    // information.
+    // The following is for backward compatibility with databases created with
+    // CodeQL 2.19.3, 2.19.4, and 2.20.0. Those databases include concept id
+    // expressions, but do not include concept template information.
     not exists(this.getConcept()) and
     result = "concept<...>"
   }