diff --git a/src/neo/SmartContract/ApplicationEngine.Runtime.cs b/src/neo/SmartContract/ApplicationEngine.Runtime.cs
index 8c9154a543..144239854b 100644
--- a/src/neo/SmartContract/ApplicationEngine.Runtime.cs
+++ b/src/neo/SmartContract/ApplicationEngine.Runtime.cs
@@ -29,6 +29,12 @@ partial class ApplicationEngine
         /// </summary>
         public static readonly InteropDescriptor System_Runtime_Platform = Register("System.Runtime.Platform", nameof(GetPlatform), 1 << 3, CallFlags.None);
 
+        /// <summary>
+        /// The <see cref="InteropDescriptor"/> of System.Runtime.GetNetwork.
+        /// Gets the magic number of the current network.
+        /// </summary>
+        public static readonly InteropDescriptor System_Runtime_GetNetwork = Register("System.Runtime.GetNetwork", nameof(GetNetwork), 1 << 3, CallFlags.None);
+
         /// <summary>
         /// The <see cref="InteropDescriptor"/> of System.Runtime.GetTrigger.
         /// Gets the trigger of the execution.
@@ -117,6 +123,16 @@ internal protected static string GetPlatform()
             return "NEO";
         }
 
+        /// <summary>
+        /// The implementation of System.Runtime.GetNetwork.
+        /// Gets the magic number of the current network.
+        /// </summary>
+        /// <returns>The magic number of the current network.</returns>
+        internal protected uint GetNetwork()
+        {
+            return ProtocolSettings.Network;
+        }
+
         /// <summary>
         /// The implementation of System.Runtime.GetTime.
         /// Gets the timestamp of the current block.