diff --git a/mesonbuild/interpreterbase/decorators.py b/mesonbuild/interpreterbase/decorators.py
index c200d91db..9defb9966 100644
--- a/mesonbuild/interpreterbase/decorators.py
+++ b/mesonbuild/interpreterbase/decorators.py
@@ -658,7 +658,7 @@ class FeatureCheckBase(metaclass=abc.ABCMeta):
         fv = cls.feature_registry[subproject]
         tv = cls.get_target_version(subproject)
         for version in sorted(fv.keys()):
-            message = ', '.join(sorted(f"'{i[0]}'" for i in fv[version]))
+            message = ', '.join(sorted({f"'{i[0]}'" for i in fv[version]}))
             if cls.check_version(tv, version):
                 notice_str += '\n * {}: {{{}}}'.format(version, message)
             else:
diff --git a/test cases/common/40 options/test.json b/test cases/common/40 options/test.json
index 3b34c4460..c7c7f0054 100644
--- a/test cases/common/40 options/test.json	
+++ b/test cases/common/40 options/test.json	
@@ -1,7 +1,7 @@
 {
   "stdout": [
     {
-      "line": " * 1.1.0: {'\"boolean option\" keyword argument \"value\" of type str', '\"boolean option\" keyword argument \"value\" of type str', '\"integer option\" keyword argument \"value\" of type str'}"
+      "line": " * 1.1.0: {'\"boolean option\" keyword argument \"value\" of type str', '\"integer option\" keyword argument \"value\" of type str'}"
     }
   ]
 }