diff --git a/rpcs3/Emu/Cell/PPUThread.cpp b/rpcs3/Emu/Cell/PPUThread.cpp
index c4907dc6e3..9aace5b6d1 100644
--- a/rpcs3/Emu/Cell/PPUThread.cpp
+++ b/rpcs3/Emu/Cell/PPUThread.cpp
@@ -220,13 +220,15 @@ int FPRdouble::Cmp(PPCdouble a, PPCdouble b)
 	return CR_SO;
 }
 
-u64 PPUThread::FastCall(u64 addr, u64 arg1, u64 arg2, u64 arg3, u64 arg4, u64 arg5, u64 arg6, u64 arg7, u64 arg8)
+u64 PPUThread::FastCall(u64 addr, u64 rtoc, u64 arg1, u64 arg2, u64 arg3, u64 arg4, u64 arg5, u64 arg6, u64 arg7, u64 arg8)
 {
 	auto old_status = m_status;
 	auto old_PC = PC;
 	auto old_LR = LR;
+	auto old_rtoc = GPR[2];
 
 	PC = addr;
+	GPR[2] = rtoc;
 	GPR[3] = arg1;
 	GPR[4] = arg2;
 	GPR[5] = arg3;
@@ -239,6 +241,7 @@ u64 PPUThread::FastCall(u64 addr, u64 arg1, u64 arg2, u64 arg3, u64 arg4, u64 ar
 
 	Task();
 
+	GPR[2] = old_rtoc;
 	LR = old_LR;
 	PC = old_PC;
 	m_status = old_status;
diff --git a/rpcs3/Emu/Cell/PPUThread.h b/rpcs3/Emu/Cell/PPUThread.h
index 7d8cd62197..15c1a95339 100644
--- a/rpcs3/Emu/Cell/PPUThread.h
+++ b/rpcs3/Emu/Cell/PPUThread.h
@@ -842,7 +842,7 @@ public:
 public:
 	virtual void InitRegs(); 
 	virtual u64 GetFreeStackSize() const;
-	u64 FastCall(u64 addr, u64 arg1 = 0, u64 arg2 = 0, u64 arg3 = 0, u64 arg4 = 0, u64 arg5 = 0, u64 arg6 = 0, u64 arg7 = 0, u64 arg8 = 0);
+	u64 FastCall(u64 addr, u64 rtoc, u64 arg1 = 0, u64 arg2 = 0, u64 arg3 = 0, u64 arg4 = 0, u64 arg5 = 0, u64 arg6 = 0, u64 arg7 = 0, u64 arg8 = 0);
 	void FastStop();
 
 protected:
diff --git a/rpcs3/Emu/SysCalls/Modules/cellSync.cpp b/rpcs3/Emu/SysCalls/Modules/cellSync.cpp
index 00f6c79479..ab2a31d936 100644
--- a/rpcs3/Emu/SysCalls/Modules/cellSync.cpp
+++ b/rpcs3/Emu/SysCalls/Modules/cellSync.cpp
@@ -13,7 +13,8 @@ Module *cellSync = nullptr;
 #ifdef PRX_DEBUG
 #include "rpcs3.h"
 #include "prx_libsre.h"
-u32 libsre = 0;
+u32 libsre;
+u32 libsre_rtoc;
 #endif
 
 s32 syncMutexInitialize(mem_ptr_t<CellSyncMutex> mutex)
@@ -1078,7 +1079,7 @@ void syncLFQueueInit(mem_ptr_t<CellSyncLFQueue> queue, u32 buffer_addr, u32 size
 s32 syncLFQueueInitialize(mem_ptr_t<CellSyncLFQueue> queue, u32 buffer_addr, u32 size, u32 depth, CellSyncQueueDirection direction, u32 eaSignal_addr)
 {
 #ifdef PRX_DEBUG_XXX
-	return GetCurrentPPUThread().FastCall(libsre + 0x205C, queue.GetAddr(), buffer_addr, size, depth, direction, eaSignal_addr);
+	return GetCurrentPPUThread().FastCall(libsre + 0x205C, libsre_rtoc, queue.GetAddr(), buffer_addr, size, depth, direction, eaSignal_addr);
 #else
 
 	if (!queue)
@@ -1522,7 +1523,7 @@ s32 _cellSyncLFQueuePushBody(mem_ptr_t<CellSyncLFQueue> queue, u32 buffer_addr,
 		if (queue->m_direction.ToBE() != se32(CELL_SYNC_QUEUE_ANY2ANY))
 		{
 #ifdef PRX_DEBUG_XXX
-			res = GetCurrentPPUThread().FastCall(libsre + 0x24B0, queue.GetAddr(), position_v.GetAddr(), isBlocking, 0);
+			res = GetCurrentPPUThread().FastCall(libsre + 0x24B0, libsre_rtoc, queue.GetAddr(), position_v.GetAddr(), isBlocking, 0);
 			position = position_v->ToLE();
 #else
 			res = syncLFQueueGetPushPointer(queue, position, isBlocking, 0);
@@ -1531,7 +1532,7 @@ s32 _cellSyncLFQueuePushBody(mem_ptr_t<CellSyncLFQueue> queue, u32 buffer_addr,
 		else
 		{
 #ifdef PRX_DEBUG
-			res = GetCurrentPPUThread().FastCall(libsre + 0x3050, queue.GetAddr(), position_v.GetAddr(), isBlocking, 0);
+			res = GetCurrentPPUThread().FastCall(libsre + 0x3050, libsre_rtoc, queue.GetAddr(), position_v.GetAddr(), isBlocking, 0);
 			position = position_v->ToLE();
 #else
 			res = syncLFQueueGetPushPointer2(queue, position, isBlocking, 0);
@@ -1566,7 +1567,7 @@ s32 _cellSyncLFQueuePushBody(mem_ptr_t<CellSyncLFQueue> queue, u32 buffer_addr,
 	if (queue->m_direction.ToBE() != se32(CELL_SYNC_QUEUE_ANY2ANY))
 	{
 #ifdef PRX_DEBUG_XXX
-		res = GetCurrentPPUThread().FastCall(libsre + 0x26C0, queue.GetAddr(), position, 0);
+		res = GetCurrentPPUThread().FastCall(libsre + 0x26C0, libsre_rtoc, queue.GetAddr(), position, 0);
 #else
 		res = syncLFQueueCompletePushPointer(queue, position, nullptr);
 #endif
@@ -1574,7 +1575,7 @@ s32 _cellSyncLFQueuePushBody(mem_ptr_t<CellSyncLFQueue> queue, u32 buffer_addr,
 	else
 	{
 #ifdef PRX_DEBUG
-		res = GetCurrentPPUThread().FastCall(libsre + 0x355C, queue.GetAddr(), position, 0);
+		res = GetCurrentPPUThread().FastCall(libsre + 0x355C, libsre_rtoc, queue.GetAddr(), position, 0);
 #else
 		res = syncLFQueueCompletePushPointer2(queue, position, nullptr);
 #endif
@@ -1913,7 +1914,7 @@ s32 _cellSyncLFQueuePopBody(mem_ptr_t<CellSyncLFQueue> queue, u32 buffer_addr, u
 		if (queue->m_direction.ToBE() != se32(CELL_SYNC_QUEUE_ANY2ANY))
 		{
 #ifdef PRX_DEBUG_XXX
-			res = GetCurrentPPUThread().FastCall(libsre + 0x2A90, queue.GetAddr(), position_v.GetAddr(), isBlocking, 0, 0);
+			res = GetCurrentPPUThread().FastCall(libsre + 0x2A90, libsre_rtoc, queue.GetAddr(), position_v.GetAddr(), isBlocking, 0, 0);
 			position = position_v->ToLE();
 #else
 			res = syncLFQueueGetPopPointer(queue, position, isBlocking, 0, 0);
@@ -1922,7 +1923,7 @@ s32 _cellSyncLFQueuePopBody(mem_ptr_t<CellSyncLFQueue> queue, u32 buffer_addr, u
 		else
 		{
 #ifdef PRX_DEBUG
-			res = GetCurrentPPUThread().FastCall(libsre + 0x39AC, queue.GetAddr(), position_v.GetAddr(), isBlocking, 0);
+			res = GetCurrentPPUThread().FastCall(libsre + 0x39AC, libsre_rtoc, queue.GetAddr(), position_v.GetAddr(), isBlocking, 0);
 			position = position_v->ToLE();
 #else
 			res = syncLFQueueGetPopPointer2(queue, position, isBlocking, 0);
@@ -1954,7 +1955,7 @@ s32 _cellSyncLFQueuePopBody(mem_ptr_t<CellSyncLFQueue> queue, u32 buffer_addr, u
 	if (queue->m_direction.ToBE() != se32(CELL_SYNC_QUEUE_ANY2ANY))
 	{
 #ifdef PRX_DEBUG_XXX
-		res = GetCurrentPPUThread().FastCall(libsre + 0x2CA8, queue.GetAddr(), position, 0, 0);
+		res = GetCurrentPPUThread().FastCall(libsre + 0x2CA8, libsre_rtoc, queue.GetAddr(), position, 0, 0);
 #else
 		res = syncLFQueueCompletePopPointer(queue, position, nullptr, 0);
 #endif
@@ -1962,7 +1963,7 @@ s32 _cellSyncLFQueuePopBody(mem_ptr_t<CellSyncLFQueue> queue, u32 buffer_addr, u
 	else
 	{
 #ifdef PRX_DEBUG
-		res = GetCurrentPPUThread().FastCall(libsre + 0x3EB8, queue.GetAddr(), position, 0, 0);
+		res = GetCurrentPPUThread().FastCall(libsre + 0x3EB8, libsre_rtoc, queue.GetAddr(), position, 0, 0);
 #else
 		res = syncLFQueueCompletePopPointer2(queue, position, nullptr, 0);
 #endif
@@ -2207,6 +2208,7 @@ void cellSync_init()
 	{
 		libsre = Memory.PRXMem.AllocAlign(sizeof(libsre_data), 4096);
 		memcpy(Memory + libsre, libsre_data, sizeof(libsre_data));
+		libsre_rtoc = libsre + 0x399B0;
 	});
 #endif
 }