diff --git a/src/acs/call-funcs.cpp b/src/acs/call-funcs.cpp
index 4531771e3..c0e91be76 100644
--- a/src/acs/call-funcs.cpp
+++ b/src/acs/call-funcs.cpp
@@ -1367,6 +1367,20 @@ bool CallFunc_BreakTheCapsules(ACSVM::Thread *thread, const ACSVM::Word *argV, A
 	return false;
 }
 
+/*--------------------------------------------------
+	bool CallFunc_TimeAttack(ACSVM::Thread *thread, const ACSVM::Word *argV, ACSVM::Word argC)
+
+		Returns if the map is a Time Attack session.
+--------------------------------------------------*/
+bool CallFunc_TimeAttack(ACSVM::Thread *thread, const ACSVM::Word *argV, ACSVM::Word argC)
+{
+	(void)argV;
+	(void)argC;
+
+	thread->dataStk.push((modeattacking != ATTACKING_NONE));
+	return false;
+}
+
 /*--------------------------------------------------
 	bool CallFunc_PodiumPosition(ACSVM::Thread *thread, const ACSVM::Word *argV, ACSVM::Word argC)
 
diff --git a/src/acs/call-funcs.hpp b/src/acs/call-funcs.hpp
index aecd32094..dff479bd3 100644
--- a/src/acs/call-funcs.hpp
+++ b/src/acs/call-funcs.hpp
@@ -85,6 +85,7 @@ bool CallFunc_PlayerLap(ACSVM::Thread *thread, const ACSVM::Word *argV, ACSVM::W
 bool CallFunc_LowestLap(ACSVM::Thread *thread, const ACSVM::Word *argV, ACSVM::Word argC);
 bool CallFunc_EncoreMode(ACSVM::Thread *thread, const ACSVM::Word *argV, ACSVM::Word argC);
 bool CallFunc_BreakTheCapsules(ACSVM::Thread *thread, const ACSVM::Word *argV, ACSVM::Word argC);
+bool CallFunc_TimeAttack(ACSVM::Thread *thread, const ACSVM::Word *argV, ACSVM::Word argC);
 
 bool CallFunc_PodiumPosition(ACSVM::Thread *thread, const ACSVM::Word *argV, ACSVM::Word argC);
 bool CallFunc_PodiumFinish(ACSVM::Thread *thread, const ACSVM::Word *argV, ACSVM::Word argC);
diff --git a/src/acs/environment.cpp b/src/acs/environment.cpp
index 83679551c..38e74a172 100644
--- a/src/acs/environment.cpp
+++ b/src/acs/environment.cpp
@@ -162,6 +162,7 @@ Environment::Environment()
 	addFuncDataACS0( 308, addCallFunc(CallFunc_LowestLap));
 	addFuncDataACS0( 309, addCallFunc(CallFunc_EncoreMode));
 	addFuncDataACS0( 310, addCallFunc(CallFunc_BreakTheCapsules));
+	addFuncDataACS0( 311, addCallFunc(CallFunc_TimeAttack));
 
 	addFuncDataACS0( 500, addCallFunc(CallFunc_CameraWait));
 	addFuncDataACS0( 501, addCallFunc(CallFunc_PodiumPosition));