diff --git a/src/d_netcmd.c b/src/d_netcmd.c
index a3213489b..f19c0f2fc 100644
--- a/src/d_netcmd.c
+++ b/src/d_netcmd.c
@@ -1092,6 +1092,7 @@ void D_RegisterClientCommands(void)
 	COM_AddCommand("rteleport", Command_RTeleport_f);
 	COM_AddCommand("skynum", Command_Skynum_f);
 	COM_AddCommand("weather", Command_Weather_f);
+	COM_AddCommand("grayscale", Command_Grayscale_f);
 #ifdef _DEBUG
 	COM_AddCommand("causecfail", Command_CauseCfail_f);
 #endif
diff --git a/src/m_cheat.c b/src/m_cheat.c
index 9614c9b60..be4f231e1 100644
--- a/src/m_cheat.c
+++ b/src/m_cheat.c
@@ -762,6 +762,13 @@ void Command_Setlives_f(void)
 	D_Cheat(consoleplayer, CHEAT_LIVES, atoi(COM_Argv(1)));
 }
 
+void Command_Grayscale_f(void)
+{
+	REQUIRE_CHEATS;
+
+	COM_ImmedExecute("toggle palette \"\" GRAYPAL");
+}
+
 //
 // OBJECTPLACE (and related variables)
 //
diff --git a/src/m_cheat.h b/src/m_cheat.h
index 4d97cb8d9..c952721c3 100644
--- a/src/m_cheat.h
+++ b/src/m_cheat.h
@@ -75,6 +75,7 @@ void Command_Teleport_f(void);
 void Command_RTeleport_f(void);
 void Command_Skynum_f(void);
 void Command_Weather_f(void);
+void Command_Grayscale_f(void);
 #ifdef _DEBUG
 void Command_CauseCfail_f(void);
 #endif