diff --git a/src/ai/ai_instance.cpp b/src/ai/ai_instance.cpp
index c79ea0d344..f5a78e2696 100644
--- a/src/ai/ai_instance.cpp
+++ b/src/ai/ai_instance.cpp
@@ -80,8 +80,6 @@
 
 #undef DEFINE_SCRIPT_FILES
 
-/* static */ AIInstance *AIInstance::current_instance = NULL;
-
 AIStorage::~AIStorage()
 {
 	/* Free our pointers */
@@ -108,7 +106,6 @@ AIInstance::AIInstance(AIInfo *info) :
 {
 	/* Set the instance already, so we can use AIObject::Set commands */
 	Company::Get(_current_company)->ai_instance = this;
-	AIInstance::current_instance = this;
 
 	this->controller = new AIController();
 	this->storage    = new AIStorage();
diff --git a/src/ai/ai_instance.hpp b/src/ai/ai_instance.hpp
index 4c9cb69a54..41653dba1c 100644
--- a/src/ai/ai_instance.hpp
+++ b/src/ai/ai_instance.hpp
@@ -114,8 +114,6 @@ public:
 	static void LoadEmpty();
 
 private:
-	static class AIInstance *current_instance; //!< Static current AIInstance, so we can register AIs.
-
 	class AIController *controller;
 	class AIStorage *storage;
 	class Squirrel *engine;