diff --git a/apps/openmw/mwmechanics/security.cpp b/apps/openmw/mwmechanics/security.cpp
index 054a0924f..82905ee4a 100644
--- a/apps/openmw/mwmechanics/security.cpp
+++ b/apps/openmw/mwmechanics/security.cpp
@@ -69,7 +69,7 @@ namespace MWMechanics
                 
                 mwmp::Main::get().getNetworking()->getWorldPacket(ID_OBJECT_UNLOCK)->Send(event);
                 delete event;
-                event = nullptr;
+                event = NULL;
 
                 lock.getClass().unlock(lock);
                 resultMessage = "#{sLockSuccess}";
diff --git a/apps/openmw/mwscript/animationextensions.cpp b/apps/openmw/mwscript/animationextensions.cpp
index 4aa6a66ea..08463f479 100644
--- a/apps/openmw/mwscript/animationextensions.cpp
+++ b/apps/openmw/mwscript/animationextensions.cpp
@@ -78,7 +78,7 @@ namespace MWScript
 
                         mwmp::Main::get().getNetworking()->getWorldPacket(ID_OBJECT_ANIM_PLAY)->Send(event);
                         delete event;
-                        event = nullptr;
+                        event = NULL;
                     }
 
                     MWBase::Environment::get().getMechanicsManager()->playAnimationGroup (ptr, group, mode, std::numeric_limits<int>::max(), true);
diff --git a/apps/openmw/mwscript/interpretercontext.cpp b/apps/openmw/mwscript/interpretercontext.cpp
index 016d131ed..4dce7a0ac 100644
--- a/apps/openmw/mwscript/interpretercontext.cpp
+++ b/apps/openmw/mwscript/interpretercontext.cpp
@@ -209,7 +209,7 @@ namespace MWScript
                 worldObject.shortVal);
 
             delete event;
-            event = nullptr;
+            event = NULL;
         }
     }
 
@@ -253,7 +253,7 @@ namespace MWScript
                 worldObject.floatVal);
 
             delete event;
-            event = nullptr;
+            event = NULL;
         }
     }
 
@@ -315,7 +315,7 @@ namespace MWScript
                 worldObject.shortVal);
 
             delete event;
-            event = nullptr;
+            event = NULL;
         }
 
         MWBase::Environment::get().getWorld()->setGlobalInt (name, value);
@@ -657,7 +657,7 @@ namespace MWScript
                 worldObject.shortVal);
 
             delete event;
-            event = nullptr;
+            event = NULL;
         }
     }
 
diff --git a/apps/openmw/mwscript/miscextensions.cpp b/apps/openmw/mwscript/miscextensions.cpp
index f0ae17efb..e9bb1d254 100644
--- a/apps/openmw/mwscript/miscextensions.cpp
+++ b/apps/openmw/mwscript/miscextensions.cpp
@@ -99,7 +99,7 @@ namespace MWScript
 
                 mwmp::Main::get().getNetworking()->getWorldPacket(ID_VIDEO_PLAY)->Send(event);
                 delete event;
-                event = nullptr;
+                event = NULL;
 
                 MWBase::Environment::get().getWindowManager()->playVideo (name, allowSkipping);
             }
@@ -211,7 +211,7 @@ namespace MWScript
 
                     mwmp::Main::get().getNetworking()->getWorldPacket(ID_OBJECT_LOCK)->Send(event);
                     delete event;
-                    event = nullptr;
+                    event = NULL;
 
                     ptr.getClass().lock (ptr, lockLevel);
 
@@ -250,7 +250,7 @@ namespace MWScript
 
                     mwmp::Main::get().getNetworking()->getWorldPacket(ID_OBJECT_UNLOCK)->Send(event);
                     delete event;
-                    event = nullptr;
+                    event = NULL;
 
                     ptr.getClass().unlock (ptr);
                 }
@@ -723,7 +723,7 @@ namespace MWScript
 
                         mwmp::Main::get().getNetworking()->getWorldPacket(ID_OBJECT_DELETE)->Send(event);
                         delete event;
-                        event = nullptr;
+                        event = NULL;
 
                         MWBase::Environment::get().getWorld()->deleteObject(ptr);
                     }
diff --git a/apps/openmw/mwscript/soundextensions.cpp b/apps/openmw/mwscript/soundextensions.cpp
index 0c22d477c..01711730e 100644
--- a/apps/openmw/mwscript/soundextensions.cpp
+++ b/apps/openmw/mwscript/soundextensions.cpp
@@ -79,7 +79,7 @@ namespace MWScript
 
                     mwmp::Main::get().getNetworking()->getWorldPacket(ID_MUSIC_PLAY)->Send(event);
                     delete event;
-                    event = nullptr;
+                    event = NULL;
 
                     MWBase::Environment::get().getSoundManager()->streamMusic (sound);
                 }
diff --git a/apps/openmw/mwscript/transformationextensions.cpp b/apps/openmw/mwscript/transformationextensions.cpp
index 6d6d9ec1f..f315e01ff 100644
--- a/apps/openmw/mwscript/transformationextensions.cpp
+++ b/apps/openmw/mwscript/transformationextensions.cpp
@@ -58,7 +58,7 @@ namespace MWScript
 
                     mwmp::Main::get().getNetworking()->getWorldPacket(ID_OBJECT_SCALE)->Send(event);
                     delete event;
-                    event = nullptr;
+                    event = NULL;
 
                     MWBase::Environment::get().getWorld()->scaleObject(ptr,scale);
                 }
@@ -574,7 +574,7 @@ namespace MWScript
                             worldObject.count);
 
                         delete event;
-                        event = nullptr;
+                        event = NULL;
                     }
                 }
         };
diff --git a/apps/openmw/mwworld/actiontake.cpp b/apps/openmw/mwworld/actiontake.cpp
index 5bd8a9829..b91fbad55 100644
--- a/apps/openmw/mwworld/actiontake.cpp
+++ b/apps/openmw/mwworld/actiontake.cpp
@@ -42,7 +42,7 @@ namespace MWWorld
             event->cell.getDescription().c_str());
 
         delete event;
-        event = nullptr;
+        event = NULL;
 
         // LocalPlayer's inventory has changed, so send a packet with it
         mwmp::Main::get().getLocalPlayer()->sendInventory();
diff --git a/apps/openmw/mwworld/worldimp.cpp b/apps/openmw/mwworld/worldimp.cpp
index 83844a9b1..4bfebca48 100644
--- a/apps/openmw/mwworld/worldimp.cpp
+++ b/apps/openmw/mwworld/worldimp.cpp
@@ -2284,7 +2284,7 @@ namespace MWWorld
             worldObject.state ? "true" : "false");
 
         delete event;
-        event = nullptr;
+        event = NULL;
 
         door.getClass().setDoorState(door, state);
         mDoorStates[door] = state;
@@ -2311,7 +2311,7 @@ namespace MWWorld
             worldObject.state ? "true" : "false");
 
         delete event;
-        event = nullptr;
+        event = NULL;
 
         door.getClass().setDoorState(door, state);
         mDoorStates[door] = state;