diff --git a/AMBuilder b/AMBuilder
index 1f3d327..1a45f1d 100644
--- a/AMBuilder
+++ b/AMBuilder
@@ -8,6 +8,7 @@ sourceFiles = [
   'extension.cpp',
   'natives.cpp',
   'forwards.cpp',
+  'hltvserverwrapper.cpp',
   'hltvdirectorwrapper.cpp',
   'hltvclientwrapper.cpp'
 ]
diff --git a/natives.cpp b/natives.cpp
index c322f1e..01d3c0c 100644
--- a/natives.cpp
+++ b/natives.cpp
@@ -623,6 +623,29 @@ static cell_t Native_IsClientConnected(IPluginContext *pContext, const cell_t *p
 	return pClient->IsConnected();
 }
 
+// native bool:SourceTV_IsClientProxy(client);
+static cell_t Native_IsClientProxy(IPluginContext *pContext, const cell_t *params)
+{
+	if (hltvserver == nullptr)
+		return 0;
+
+	cell_t client = params[1];
+	if (client < 1 || client > hltvserver->GetBaseServer()->GetClientCount())
+	{
+		pContext->ReportError("Invalid spectator client index %d.", client);
+		return 0;
+	}
+
+	HLTVClientWrapper *pClient = hltvserver->GetClient(client);
+	if (!pClient->IsConnected())
+	{
+		pContext->ReportError("Client %d is not connected.", client);
+		return 0;
+	}
+
+	return pClient->BaseClient()->IsHLTV();
+}
+
 // native SourceTV_GetSpectatorName(client, String:name[], maxlen);
 static cell_t Native_GetSpectatorName(IPluginContext *pContext, const cell_t *params)
 {
@@ -756,6 +779,7 @@ const sp_nativeinfo_t sourcetv_natives[] =
 	{ "SourceTV_GetSpectatorName", Native_GetSpectatorName },
 	{ "SourceTV_GetSpectatorIP", Native_GetSpectatorIP },
 	{ "SourceTV_GetSpectatorPassword", Native_GetSpectatorPassword },
+	{ "SourceTV_IsClientProxy", Native_IsClientProxy },
 	{ "SourceTV_KickClient", Native_KickClient },
 	{ NULL, NULL },
 };
diff --git a/sourcetv_test.sp b/sourcetv_test.sp
index d56a3da..48ed618 100644
--- a/sourcetv_test.sp
+++ b/sourcetv_test.sp
@@ -189,7 +189,7 @@ public Action:Cmd_Spectators(client, args)
 		
 		SourceTV_GetSpectatorName(i, sName, sizeof(sName));
 		SourceTV_GetSpectatorIP(i, sIP, sizeof(sIP));
-		ReplyToCommand(client, "Client %d: %s - %s", i, sName, sIP);
+		ReplyToCommand(client, "Client %d%s: %s - %s", i, (SourceTV_IsClientProxy(i)?" (RELAY)":""), sName, sIP);
 	}
 	return Plugin_Handled;
 }
diff --git a/sourcetvmanager.inc b/sourcetvmanager.inc
index c12c6a4..5d8e2a1 100644
--- a/sourcetvmanager.inc
+++ b/sourcetvmanager.inc
@@ -332,6 +332,15 @@ native SourceTV_GetClientCount();
  */
 native bool:SourceTV_IsClientConnected(client);
 
+/**
+ * Returns if the spectator is a relay proxy.
+ *
+ * @param client	The spectator client index.
+ * @return	True if client is a proxy, false otherwise.
+ * @error	Invalid client index.
+ */
+native bool:SourceTV_IsClientProxy(client);
+
 /**
  * Get the name of a SourceTV spectator client.
  *
@@ -479,6 +488,7 @@ public __ext_stvmngr_SetNTVOptional()
 	MarkNativeAsOptional("SourceTV_GetSpectatorName");
 	MarkNativeAsOptional("SourceTV_GetSpectatorIP");
 	MarkNativeAsOptional("SourceTV_GetSpectatorPassword");
+	MarkNativeAsOptional("SourceTV_IsClientProxy");
 	MarkNativeAsOptional("SourceTV_KickClient");
 }
 #endif