diff --git a/src/servers/registrar/Registrar.cpp b/src/servers/registrar/Registrar.cpp
index 8e62d46e73..946722cba8 100644
--- a/src/servers/registrar/Registrar.cpp
+++ b/src/servers/registrar/Registrar.cpp
@@ -95,6 +95,9 @@ Registrar::MessageReceived(BMessage *message)
 		case B_REG_SET_THREAD_AND_TEAM:
 			fRoster->HandleSetThreadAndTeam(message);
 			break;
+		case B_REG_SET_SIGNATURE:
+			fRoster->HandleSetSignature(message);
+			break;
 		case B_REG_GET_APP_INFO:
 			fRoster->HandleGetAppInfo(message);
 			break;
diff --git a/src/servers/registrar/TRoster.cpp b/src/servers/registrar/TRoster.cpp
index 937bc9c34c..2e57215ad4 100644
--- a/src/servers/registrar/TRoster.cpp
+++ b/src/servers/registrar/TRoster.cpp
@@ -462,6 +462,43 @@ PRINT(("team: %ld, thread: %ld, token: %lu\n", team, thread, token));
 	FUNCTION_END();
 }
 
+// HandleSetSignature
+/*!	\brief Handles a SetSignature() request.
+	\param request The request message
+*/
+void
+TRoster::HandleSetSignature(BMessage *request)
+{
+	FUNCTION_START();
+
+	status_t error = B_OK;
+	// get the parameters
+	team_id team;
+	const char *signature;
+	if (request->FindInt32("team", &team) != B_OK)
+		error = B_BAD_VALUE;
+	if (request->FindString("signature", &signature) != B_OK)
+		error = B_BAD_VALUE;
+	// find the app and set the signature
+	if (error == B_OK) {
+		if (RosterAppInfo *info = fRegisteredApps.InfoFor(team))
+			strcpy(info->signature, signature);
+		else
+			SET_ERROR(error, B_REG_APP_NOT_REGISTERED);
+	}
+	// reply to the request
+	if (error == B_OK) {
+		BMessage reply(B_REG_SUCCESS);
+		request->SendReply(&reply);
+	} else {
+		BMessage reply(B_REG_ERROR);
+		reply.AddInt32("error", error);
+		request->SendReply(&reply);
+	}
+
+	FUNCTION_END();
+}
+
 // HandleGetAppInfo
 /*!	\brief Handles a Get{Running,Active,}AppInfo() request.
 	\param request The request message
diff --git a/src/servers/registrar/TRoster.h b/src/servers/registrar/TRoster.h
index 9cd8743e9a..cea0fb4394 100644
--- a/src/servers/registrar/TRoster.h
+++ b/src/servers/registrar/TRoster.h
@@ -58,6 +58,7 @@ public:
 	void HandleRemovePreRegApp(BMessage *request);
 	void HandleRemoveApp(BMessage *request);
 	void HandleSetThreadAndTeam(BMessage *request);
+	void HandleSetSignature(BMessage *request);
 	void HandleGetAppInfo(BMessage *request);
 	void HandleGetAppList(BMessage *request);
 	void HandleActivateApp(BMessage *request);