diff --git a/src/PromQL.Parser/Printer.cs b/src/PromQL.Parser/Printer.cs
index 1e3d4ca..d172c3c 100644
--- a/src/PromQL.Parser/Printer.cs
+++ b/src/PromQL.Parser/Printer.cs
@@ -173,7 +173,7 @@ public virtual void Visit(VectorMatching vm)
                 _sb.Append(vm.MatchCardinality.ToPromQl());
             }
 
-            if (vm.Include.Length > 0)
+            if (vm.Include.Length > 0 || vm.MatchCardinality != VectorMatching.DefaultMatchCardinality)
             {
                 if (_sb.Length > 0)
                     _sb.Append(" ");
diff --git a/tests/PromQL.Parser.Tests/PrinterTests.cs b/tests/PromQL.Parser.Tests/PrinterTests.cs
index 8d8927e..72d932a 100644
--- a/tests/PromQL.Parser.Tests/PrinterTests.cs
+++ b/tests/PromQL.Parser.Tests/PrinterTests.cs
@@ -136,7 +136,7 @@ public void VectorMatching_GroupRight_NoLabels_ToPromQl()
                 false,
                 ImmutableArray<string>.Empty,
                 false
-            )).Should().Be("group_right");
+            )).Should().Be("group_right ()");
         }
         
         [Test]