diff --git a/src/main/java/org/apache/xmlbeans/impl/values/JavaNotationHolderEx.java b/src/main/java/org/apache/xmlbeans/impl/values/JavaNotationHolderEx.java
index a6eddc0bb..6dbbd4871 100644
--- a/src/main/java/org/apache/xmlbeans/impl/values/JavaNotationHolderEx.java
+++ b/src/main/java/org/apache/xmlbeans/impl/values/JavaNotationHolderEx.java
@@ -101,7 +101,7 @@ private static boolean check(String v, SchemaType sType)
         if (len != null)
         {
             int m = ((XmlObjectBase)len).getBigIntegerValue().intValue();
-            if (!(v.length() != m))
+            if (v.length() != m)
                 return false;
         }
 
diff --git a/src/main/java/org/apache/xmlbeans/impl/values/JavaUriHolderEx.java b/src/main/java/org/apache/xmlbeans/impl/values/JavaUriHolderEx.java
index 74b155532..41817bc3d 100644
--- a/src/main/java/org/apache/xmlbeans/impl/values/JavaUriHolderEx.java
+++ b/src/main/java/org/apache/xmlbeans/impl/values/JavaUriHolderEx.java
@@ -123,7 +123,7 @@ private static boolean check(String v, SchemaType sType) {
         XmlObject len = sType.getFacet(SchemaType.FACET_LENGTH);
         if (len != null) {
             int m = ((SimpleValue) len).getBigIntegerValue().intValue();
-            if (length == m) {
+            if (length != m) {
                 return false;
             }
         }
diff --git a/src/test/java/misc/checkin/LengthFacetValidateOnSetTest.java b/src/test/java/misc/checkin/LengthFacetValidateOnSetTest.java
new file mode 100644
index 000000000..f2bfa85fe
--- /dev/null
+++ b/src/test/java/misc/checkin/LengthFacetValidateOnSetTest.java
@@ -0,0 +1,63 @@
+/*   Copyright 2004 The Apache Software Foundation
+ *
+ *   Licensed under the Apache License, Version 2.0 (the "License");
+ *   you may not use this file except in compliance with the License.
+ *   You may obtain a copy of the License at
+ *
+ *       http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *   Unless required by applicable law or agreed to in writing, software
+ *   distributed under the License is distributed on an "AS IS" BASIS,
+ *   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *   See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
+package misc.checkin;
+
+import org.apache.xmlbeans.SchemaTypeLoader;
+import org.apache.xmlbeans.SimpleValue;
+import org.apache.xmlbeans.XmlBeans;
+import org.apache.xmlbeans.XmlCursor;
+import org.apache.xmlbeans.XmlObject;
+import org.apache.xmlbeans.XmlOptions;
+import org.apache.xmlbeans.impl.values.XmlValueOutOfRangeException;
+import org.apache.xmlbeans.impl.xb.xsdschema.SchemaDocument;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertDoesNotThrow;
+import static org.junit.jupiter.api.Assertions.assertThrows;
+
+public class LengthFacetValidateOnSetTest {
+
+    private static SimpleValue rootWithValidateOnSet(String base) throws Exception {
+        String xsd =
+            "<xs:schema xmlns:xs='http://www.w3.org/2001/XMLSchema' " +
+            "xmlns:t='urn:t' targetNamespace='urn:t' elementFormDefault='qualified'>" +
+            "  <xs:element name='root'>" +
+            "    <xs:simpleType>" +
+            "      <xs:restriction base='" + base + "'>" +
+            "        <xs:length value='5'/>" +
+            "      </xs:restriction>" +
+            "    </xs:simpleType>" +
+            "  </xs:element>" +
+            "</xs:schema>";
+
+        SchemaTypeLoader loader = XmlBeans.loadXsd(new XmlObject[]{SchemaDocument.Factory.parse(xsd)});
+        XmlOptions options = new XmlOptions().setValidateOnSet();
+        XmlObject doc = loader.parse("<t:root xmlns:t='urn:t'>abcde</t:root>", null, options);
+        try (XmlCursor c = doc.newCursor()) {
+            c.toFirstChild();
+            return (SimpleValue) c.getObject();
+        }
+    }
+
+    @Test
+    void anyUriLengthFacetOnSet() throws Exception {
+        SimpleValue root = rootWithValidateOnSet("xs:anyURI");
+        // a value whose length matches the length facet must be accepted
+        assertDoesNotThrow(() -> root.setStringValue("xyzab"));
+        // a value whose length does not match must be rejected
+        assertThrows(XmlValueOutOfRangeException.class, () -> root.setStringValue("xyz"));
+    }
+}