diff --git a/src/TxHookParser.php b/src/TxHookParser.php
index 4b5a725..4520c52 100644
--- a/src/TxHookParser.php
+++ b/src/TxHookParser.php
@@ -89,7 +89,8 @@ private function extractHooksFromMeta(): void
               case 'Hook':
                 $parsed = $this->hookChangesFromModifiedHookNode(
                   (isset($AffectedNode->ModifiedNode->PreviousFields) && $AffectedNode->ModifiedNode->PreviousFields)?$AffectedNode->ModifiedNode->PreviousFields->Hooks:null,
-                  (isset($AffectedNode->ModifiedNode->FinalFields) && $AffectedNode->ModifiedNode->FinalFields)?$AffectedNode->ModifiedNode->FinalFields->Hooks:null
+                  (isset($AffectedNode->ModifiedNode->FinalFields) && $AffectedNode->ModifiedNode->FinalFields)?$AffectedNode->ModifiedNode->FinalFields->Hooks:null,
+                  isset($AffectedNode->ModifiedNode->PreviousFields)
                 );
                 if(count($parsed['added'])) {
                   foreach($parsed['added'] as $h => $hv) {
@@ -192,8 +193,12 @@ private function normalizeHookNode(\stdClass $node): array
     return $n;
   }
 
-  private function hookChangesFromModifiedHookNode(?array $prev, ?array $final): array
+  private function hookChangesFromModifiedHookNode(?array $prev, ?array $final, bool $prevFieldsSet): array
   {
+    //flag to indicate modification of hook (prev does not exist in modified node)
+    //ledger does not include previous fields when there is no changes
+    $is_modify = !$prevFieldsSet;
+
     $prev = $prev === null?[]:$prev;
     $final = $final === null?[]:$final;
 
@@ -218,12 +223,14 @@ private function hookChangesFromModifiedHookNode(?array $prev, ?array $final): a
         $tracker[$h]['state']++;
       }
     }
-
     foreach($tracker as $h => $data) {
       $state = $data['state'];
       if($state === 0) {
         //hook added
-        $r['added'][$h] = true;
+        if($is_modify)
+          $r['modified'][$h] = true;
+        else
+          $r['added'][$h] = true;
       } else if($state === 1) {
         //hook removed
         $r['removed'][$h] = true;
diff --git a/tests/Tx05Test.php b/tests/Tx05Test.php
index 5e4a1cc..d8f6885 100644
--- a/tests/Tx05Test.php
+++ b/tests/Tx05Test.php
@@ -31,7 +31,9 @@ public function testSetHookUpdate()
     # List of modified hooks
     $modifiedHooks = $TxHookParser->modifiedHooks();
     $this->assertIsArray($modifiedHooks);
-    $this->assertEquals([], $modifiedHooks);
+    $this->assertEquals([
+      '012FD32EDF56C26C0C8919E432E15A5F242CC1B31AF814D464891C560465613B', //modified but unchanged
+    ], $modifiedHooks);
     
     # List of all accounts
     $accounts = $TxHookParser->accounts();
diff --git a/tests/Tx13Test.php b/tests/Tx13Test.php
new file mode 100644
index 0000000..071e057
--- /dev/null
+++ b/tests/Tx13Test.php
@@ -0,0 +1,35 @@
+<?php declare(strict_types=1);
+
+namespace XRPLWin\XRPLHookParser\Tests;
+
+use PHPUnit\Framework\TestCase;
+use XRPLWin\XRPLHookParser\TxHookParser;
+
+/***
+ * SetHook
+ * In this transaction setHook is executed, modified hook but without changes
+ * This parser should register this as modified hook.
+ */
+final class Tx13Test extends TestCase
+{
+  public function testSetHookExtractDestroyedHook()
+  {
+    $transaction = file_get_contents(__DIR__.'/fixtures/tx13.json');
+    $transaction = \json_decode($transaction);
+    $TxHookParser = new TxHookParser($transaction->result);
+
+    # List of installed hooks
+    $installedHooks = $TxHookParser->installedHooks();
+    $this->assertIsArray($installedHooks);
+    $this->assertEquals([], $installedHooks);
+
+    # List of modified hooks
+    $modifiedHooks = $TxHookParser->modifiedHooks();
+    $this->assertIsArray($modifiedHooks);
+    $this->assertEquals([
+      '8604F7EB191536337C1BF7F9048404FBAD1108F6C7BEBCCB9A07A6FDEDB0A840',
+    ], $modifiedHooks);
+    
+    
+  }
+}
\ No newline at end of file
diff --git a/tests/fixtures/tx13.json b/tests/fixtures/tx13.json
new file mode 100644
index 0000000..8ce3a6e
--- /dev/null
+++ b/tests/fixtures/tx13.json
@@ -0,0 +1,73 @@
+{
+  "result": {
+    "Account": "rpYftCXmEa1gsG95MYGgCKwQhbCHWTtSXx",
+    "Fee": "2038520",
+    "Hooks": [
+      {
+        "Hook": {
+          "CreateCode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+          "Flags": 1,
+          "HookApiVersion": 0,
+          "HookNamespace": "D9E9A7DA1936E01C92E4F567D3F6F718932217F022353BDCE4DDA0E206E67788",
+          "HookOn": "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFBFFFFE"
+        }
+      }
+    ],
+    "NetworkID": 21338,
+    "Sequence": 755264952,
+    "SigningPubKey": "02C3C07A51635C4AC5309198DAB0D00A47D232B9E85ADD72D973F7BC7170445172",
+    "TransactionType": "SetHook",
+    "TxnSignature": "3045022100FC38A4BB2EFEE70B32287866635963E63287757F9C6D48BB43BF12097A1B1F810220523FAF2D5B0D3507745500C7DF933077C87B151D833C71D2BB339B17557DFE1E",
+    "ctid": "C088AD470000535A",
+    "date": 755265431,
+    "hash": "EC4674246C80D9FCA165B1D1FE4A98FC85ECB300D7B6D4188E25FC5CB01115BA",
+    "inLedger": 8957255,
+    "ledger_index": 8957255,
+    "meta": {
+      "AffectedNodes": [
+        {
+          "ModifiedNode": {
+            "FinalFields": {
+              "Account": "rpYftCXmEa1gsG95MYGgCKwQhbCHWTtSXx",
+              "Flags": 0,
+              "Hooks": [
+                {
+                  "Hook": {
+                    "Flags": 0,
+                    "HookHash": "8604F7EB191536337C1BF7F9048404FBAD1108F6C7BEBCCB9A07A6FDEDB0A840",
+                    "HookOn": "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFBFFFFE"
+                  }
+                }
+              ],
+              "OwnerNode": "0"
+            },
+            "LedgerEntryType": "Hook",
+            "LedgerIndex": "5E1FDCB478FD57348BAC31ED7F3104D475533C87C2A809FB36D22D2567590170"
+          }
+        },
+        {
+          "ModifiedNode": {
+            "FinalFields": {
+              "Account": "rpYftCXmEa1gsG95MYGgCKwQhbCHWTtSXx",
+              "AccountIndex": "2519",
+              "Balance": "9993884440",
+              "Flags": 0,
+              "OwnerCount": 1,
+              "Sequence": 755264953
+            },
+            "LedgerEntryType": "AccountRoot",
+            "LedgerIndex": "D13888EF5BBD3C86BE3CCBFBB4C1A7A19DCF9C19A10671BE2E7516FAD3E9E7B6",
+            "PreviousFields": {
+              "Balance": "9995922960",
+              "Sequence": 755264952
+            }
+          }
+        }
+      ],
+      "TransactionIndex": 0,
+      "TransactionResult": "tesSUCCESS"
+    },
+    "status": "success",
+    "validated": true
+  }
+}
\ No newline at end of file