diff --git a/src/core/meshcop/dataset_manager.cpp b/src/core/meshcop/dataset_manager.cpp
index 3455415ce..5c015a91e 100644
--- a/src/core/meshcop/dataset_manager.cpp
+++ b/src/core/meshcop/dataset_manager.cpp
@@ -373,6 +373,25 @@ void DatasetManager::Get(const Coap::Header &aHeader, const Message &aMessage,
         offset += sizeof(tlv) + tlv.GetLength();
     }
 
+    // MGMT_PENDING_GET.rsp must include Delay Timer TLV (Thread 1.1.1 Section 8.7.5.4)
+    if (length != 0 && strcmp(mUriGet, OT_URI_PATH_PENDING_GET) == 0)
+    {
+        uint16_t i;
+
+        for (i = 0; i < length; i++)
+        {
+            if (tlvs[i] == Tlv::kDelayTimer)
+            {
+                break;
+            }
+        }
+
+        if (i == length && (i + 1u) <= sizeof(tlvs))
+        {
+            tlvs[length++] = Tlv::kDelayTimer;
+        }
+    }
+
     SendGetResponse(aHeader, aMessageInfo, tlvs, length);
 }