diff --git a/hadoop-ozone/integration-test/src/test/java/org/apache/hadoop/ozone/om/TestKeyManagerImpl.java b/hadoop-ozone/integration-test/src/test/java/org/apache/hadoop/ozone/om/TestKeyManagerImpl.java
index 67b09a1434a7..9a5ded71484b 100644
--- a/hadoop-ozone/integration-test/src/test/java/org/apache/hadoop/ozone/om/TestKeyManagerImpl.java
+++ b/hadoop-ozone/integration-test/src/test/java/org/apache/hadoop/ozone/om/TestKeyManagerImpl.java
@@ -641,7 +641,7 @@ public void testInvalidPrefixAcl() throws IOException {
     // add acl with invalid prefix name
     Exception ex = assertThrows(OMException.class,
         () -> writeClient.addAcl(ozInvalidPrefix, ozAcl1));
-    assertTrue(ex.getMessage().startsWith("Invalid prefix name"));
+    assertTrue(ex.getMessage().startsWith("Missing trailing slash"));
 
     OzoneObj ozPrefix1 = new OzoneObjInfo.Builder()
         .setVolumeName(volumeName)
@@ -659,7 +659,7 @@ public void testInvalidPrefixAcl() throws IOException {
     // get acl with invalid prefix name
     ex = assertThrows(OMException.class,
         () -> writeClient.getAcl(ozInvalidPrefix));
-    assertTrue(ex.getMessage().startsWith("Invalid prefix name"));
+    assertTrue(ex.getMessage().startsWith("Missing trailing slash"));
 
     // set acl with invalid prefix name
     List<OzoneAcl> ozoneAcls = new ArrayList<OzoneAcl>();
@@ -667,12 +667,12 @@ public void testInvalidPrefixAcl() throws IOException {
 
     ex = assertThrows(OMException.class,
         () -> writeClient.setAcl(ozInvalidPrefix, ozoneAcls));
-    assertTrue(ex.getMessage().startsWith("Invalid prefix name"));
+    assertTrue(ex.getMessage().startsWith("Missing trailing slash"));
 
     // remove acl with invalid prefix name
     ex = assertThrows(OMException.class,
         () -> writeClient.removeAcl(ozInvalidPrefix, ozAcl1));
-    assertTrue(ex.getMessage().startsWith("Invalid prefix name"));
+    assertTrue(ex.getMessage().startsWith("Missing trailing slash"));
   }
 
   @Test
diff --git a/hadoop-ozone/ozone-manager/src/main/java/org/apache/hadoop/ozone/om/PrefixManagerImpl.java b/hadoop-ozone/ozone-manager/src/main/java/org/apache/hadoop/ozone/om/PrefixManagerImpl.java
index d801d1dbf331..1a397980e630 100644
--- a/hadoop-ozone/ozone-manager/src/main/java/org/apache/hadoop/ozone/om/PrefixManagerImpl.java
+++ b/hadoop-ozone/ozone-manager/src/main/java/org/apache/hadoop/ozone/om/PrefixManagerImpl.java
@@ -42,6 +42,7 @@
 import static org.apache.hadoop.ozone.om.exceptions.OMException.ResultCodes.BUCKET_NOT_FOUND;
 import static org.apache.hadoop.ozone.om.exceptions.OMException.ResultCodes.PREFIX_NOT_FOUND;
 import static org.apache.hadoop.ozone.om.exceptions.OMException.ResultCodes.VOLUME_NOT_FOUND;
+import static org.apache.hadoop.ozone.om.exceptions.OMException.ResultCodes.INVALID_PATH_IN_ACL_REQUEST;
 import static org.apache.hadoop.ozone.om.lock.OzoneManagerLock.Resource.PREFIX_LOCK;
 import static org.apache.hadoop.ozone.security.acl.OzoneObj.ResourceType.PREFIX;
 
@@ -218,8 +219,8 @@ public void validateOzoneObj(OzoneObj obj) throws OMException {
       throw new OMException("Prefix name is required.", PREFIX_NOT_FOUND);
     }
     if (!prefixName.endsWith("/")) {
-      throw new OMException("Invalid prefix name: " + prefixName,
-          PREFIX_NOT_FOUND);
+      throw new OMException("Missing trailing slash '/' in prefix name: " + prefixName,
+          INVALID_PATH_IN_ACL_REQUEST);
     }
   }
 
diff --git a/hadoop-ozone/ozone-manager/src/test/java/org/apache/hadoop/ozone/om/request/key/TestOMPrefixAclRequest.java b/hadoop-ozone/ozone-manager/src/test/java/org/apache/hadoop/ozone/om/request/key/TestOMPrefixAclRequest.java
index 9c5a9257245f..79a0f30622db 100644
--- a/hadoop-ozone/ozone-manager/src/test/java/org/apache/hadoop/ozone/om/request/key/TestOMPrefixAclRequest.java
+++ b/hadoop-ozone/ozone-manager/src/test/java/org/apache/hadoop/ozone/om/request/key/TestOMPrefixAclRequest.java
@@ -128,7 +128,7 @@ public void testValidationFailure() {
     );
     OMClientResponse response1 =
         invalidRequest1.validateAndUpdateCache(ozoneManager, 1);
-    assertEquals(OzoneManagerProtocolProtos.Status.PREFIX_NOT_FOUND,
+    assertEquals(OzoneManagerProtocolProtos.Status.INVALID_PATH_IN_ACL_REQUEST,
         response1.getOMResponse().getStatus());
 
     // Not a valid FS path