diff --git a/src/main/scala/eu/neverblink/jelly/cli/util/jena/StatementUtils.scala b/src/main/scala/eu/neverblink/jelly/cli/util/jena/StatementUtils.scala
index c571da4..84ce8c6 100644
--- a/src/main/scala/eu/neverblink/jelly/cli/util/jena/StatementUtils.scala
+++ b/src/main/scala/eu/neverblink/jelly/cli/util/jena/StatementUtils.scala
@@ -12,11 +12,13 @@ object StatementUtils:
     q.getSubject :: q.getPredicate :: q.getObject :: q.getGraph :: Nil
 
   def isGeneralized(t: Triple): Boolean =
-    (!t.getSubject.isBlank && !t.getSubject.isURI) || !t.getPredicate.isURI
+    (!t.getSubject.isBlank && !t.getSubject.isURI && !t.getObject.isNodeTriple)
+      || !t.getPredicate.isURI
 
   def isGeneralized(q: Quad): Boolean =
-    (!q.getSubject.isBlank && !q.getSubject.isURI) || !q.getPredicate.isURI ||
-      (!q.getGraph.isBlank && !q.getGraph.isURI)
+    (!q.getSubject.isBlank && !q.getSubject.isURI && !q.getSubject.isNodeTriple)
+      || !q.getPredicate.isURI
+      || (!q.getGraph.isBlank && !q.getGraph.isURI)
 
   def isRdfStar(t: Triple): Boolean = iterateTerms(t).exists(_.isNodeTriple)
 
diff --git a/src/test/scala/eu/neverblink/jelly/cli/command/rdf/RdfValidateSpec.scala b/src/test/scala/eu/neverblink/jelly/cli/command/rdf/RdfValidateSpec.scala
index d5f7083..8c745fc 100644
--- a/src/test/scala/eu/neverblink/jelly/cli/command/rdf/RdfValidateSpec.scala
+++ b/src/test/scala/eu/neverblink/jelly/cli/command/rdf/RdfValidateSpec.scala
@@ -1,10 +1,11 @@
 package eu.neverblink.jelly.cli.command.rdf
 
-import eu.neverblink.jelly.cli.{CriticalException, ExitException}
 import eu.neverblink.jelly.cli.command.helpers.TestFixtureHelper
-import eu.ostrzyciel.jelly.core.RdfProtoDeserializationError
-import eu.ostrzyciel.jelly.core.JellyOptions
+import eu.neverblink.jelly.cli.{CriticalException, ExitException}
+import eu.ostrzyciel.jelly.convert.jena.JenaConverterFactory
 import eu.ostrzyciel.jelly.core.proto.v1.*
+import eu.ostrzyciel.jelly.core.{JellyOptions, ProtoEncoder, RdfProtoDeserializationError}
+import org.apache.jena.graph.{NodeFactory, Triple}
 import org.scalatest.matchers.should.Matchers
 import org.scalatest.wordspec.AnyWordSpec
 
@@ -511,5 +512,86 @@ class RdfValidateSpec extends AnyWordSpec, Matchers, TestFixtureHelper:
           "Invalid format option: \"invalid\"",
         )
       }
+
+      "RDF-star triples in subject and object positions (generalized=false)" in {
+        val t = Triple.create(
+          NodeFactory.createTripleNode(
+            Triple.create(
+              NodeFactory.createBlankNode(),
+              NodeFactory.createURI("http://example.org/predicate"),
+              NodeFactory.createBlankNode(),
+            ),
+          ),
+          NodeFactory.createURI("http://example.org/predicate"),
+          NodeFactory.createTripleNode(
+            Triple.create(
+              NodeFactory.createBlankNode(),
+              NodeFactory.createURI("http://example.org/predicate"),
+              NodeFactory.createBlankNode(),
+            ),
+          ),
+        )
+        val enc = JenaConverterFactory.encoder(
+          ProtoEncoder.Params(
+            JellyOptions.smallRdfStar.withPhysicalType(PhysicalStreamType.TRIPLES),
+          ),
+        )
+        val rows = enc.addTripleStatement(t)
+        val f = RdfStreamFrame(rows.toSeq)
+        val is = ByteArrayInputStream(f.toByteArray)
+        RdfValidate.setStdIn(is)
+        val (out, err) = RdfValidate.runTestCommand(List("rdf", "validate"))
+        err shouldBe empty
+      }
+
+      "not validate RDF-star triples in predicate position (generalized=false)" in {
+        val t = Triple.create(
+          NodeFactory.createBlankNode(),
+          NodeFactory.createTripleNode(
+            Triple.create(
+              NodeFactory.createBlankNode(),
+              NodeFactory.createURI("http://example.org/predicate"),
+              NodeFactory.createBlankNode(),
+            ),
+          ),
+          NodeFactory.createBlankNode(),
+        )
+        val enc = JenaConverterFactory.encoder(
+          ProtoEncoder.Params(
+            JellyOptions.smallRdfStar.withPhysicalType(PhysicalStreamType.TRIPLES),
+          ),
+        )
+        val rows = enc.addTripleStatement(t)
+        val f = RdfStreamFrame(rows.toSeq)
+        val is = ByteArrayInputStream(f.toByteArray)
+        RdfValidate.setStdIn(is)
+        val e = intercept[ExitException] {
+          RdfValidate.runTestCommand(List("rdf", "validate"))
+        }
+        e.cause.get shouldBe a[CriticalException]
+        e.cause.get.getMessage should include("Unexpected generalized triple in frame 0:")
+      }
+
+      "RDF-star triples in S, P, and O positions (generalized=true)" in {
+        val quoted = NodeFactory.createTripleNode(
+          Triple.create(
+            NodeFactory.createBlankNode(),
+            NodeFactory.createURI("http://example.org/predicate"),
+            NodeFactory.createBlankNode(),
+          ),
+        )
+        val t = Triple.create(quoted, quoted, quoted)
+        val enc = JenaConverterFactory.encoder(
+          ProtoEncoder.Params(
+            JellyOptions.smallAllFeatures.withPhysicalType(PhysicalStreamType.TRIPLES),
+          ),
+        )
+        val rows = enc.addTripleStatement(t)
+        val f = RdfStreamFrame(rows.toSeq)
+        val is = ByteArrayInputStream(f.toByteArray)
+        RdfValidate.setStdIn(is)
+        val (out, err) = RdfValidate.runTestCommand(List("rdf", "validate"))
+        err shouldBe empty
+      }
     }
   }