diff --git a/src/d_net.cpp b/src/d_net.cpp
index 26502d9a9..2195d6d1c 100644
--- a/src/d_net.cpp
+++ b/src/d_net.cpp
@@ -150,6 +150,7 @@ CVAR(Bool, vid_lowerinbackground, true, CVAR_ARCHIVE|CVAR_GLOBALCONFIG)
 CVAR(Bool, net_ticbalance, false, CVAR_SERVERINFO | CVAR_NOSAVE) // Currently deprecated, but may be brought back later.
 CVAR(Bool, net_extratic, false, CVAR_SERVERINFO | CVAR_NOSAVE)
 CVAR(Bool, net_disablepause, false, CVAR_SERVERINFO | CVAR_NOSAVE)
+CVAR(Bool, net_repeatableactioncooldown, true, CVAR_SERVERINFO | CVAR_NOSAVE)
 
 CVAR(Bool, cl_noboldchat, false, CVAR_ARCHIVE | CVAR_GLOBALCONFIG)
 CVAR(Bool, cl_nochatsound, false, CVAR_ARCHIVE | CVAR_GLOBALCONFIG)
diff --git a/src/playsim/mapthinkers/a_doors.cpp b/src/playsim/mapthinkers/a_doors.cpp
index e32068565..c13c73aa9 100644
--- a/src/playsim/mapthinkers/a_doors.cpp
+++ b/src/playsim/mapthinkers/a_doors.cpp
@@ -42,6 +42,8 @@
 #include "texturemanager.h"
 #include "vm.h"
 
+EXTERN_CVAR(Bool, net_repeatableactioncooldown)
+
 //============================================================================
 //
 // VERTICAL DOORS
@@ -486,6 +488,10 @@ bool FLevelLocals::EV_DoDoor (DDoor::EVlDoor type, line_t *line, AActor *thing,
 							return false;	// JDC: bad guys never close doors
 											//Added by MC: Neither do bots.
 
+						// Don't let users spam open/close doors when playing online.
+						if (net_repeatableactioncooldown && NetworkClients.Size() > 1)
+							return false;
+
 						door->m_Direction = -1;	// start going down immediately
 
 						// Start the door close sequence.