diff --git a/rpcs3/Emu/SysCalls/FuncList.cpp b/rpcs3/Emu/SysCalls/FuncList.cpp
index 0bd28091c4..ee1923c511 100644
--- a/rpcs3/Emu/SysCalls/FuncList.cpp
+++ b/rpcs3/Emu/SysCalls/FuncList.cpp
@@ -3592,7 +3592,6 @@ s64 SysCalls::DoFunc(const u32 id)
 	case 0x4643ba6e: FUNC_LOG_ERROR("TODO: sys_mmapper_unmap_memory");
 	case 0x4a071d98: FUNC_LOG_ERROR("TODO: sys_interrupt_thread_disestablish");
 	case 0x4b2f301a: FUNC_LOG_ERROR("TODO: _sys_tolower");
-	case 0x4f7172c9: FUNC_LOG_ERROR("TODO: sys_process_is_stack");
 	case 0x5267cb35: FUNC_LOG_ERROR("TODO: sys_spinlock_unlock");
 	case 0x52aadadf: FUNC_LOG_ERROR("TODO: sys_lwcond_signal_to");
 	case 0x5fdfb2fe: FUNC_LOG_ERROR("TODO: _sys_spu_printf_detach_group");
diff --git a/rpcs3/Emu/SysCalls/Modules/sysPrxForUser.cpp b/rpcs3/Emu/SysCalls/Modules/sysPrxForUser.cpp
index 424b0139e1..3ee463cc6b 100644
--- a/rpcs3/Emu/SysCalls/Modules/sysPrxForUser.cpp
+++ b/rpcs3/Emu/SysCalls/Modules/sysPrxForUser.cpp
@@ -22,6 +22,15 @@ s64 sys_process_at_Exitspawn()
 	return 0;
 }
 
+int sys_process_is_stack(u32 p)
+{
+	PPCThread* CPU = GetCurrentPPCThread();
+	if (p >= CPU->GetStackAddr() && p <= CPU->GetStackAddr() + CPU->GetStackSize())
+		return 1;
+
+	return 0;
+}
+
 int sys_spu_printf_initialize(int a1, int a2, int a3, int a4, int a5)
 {
 	sysPrxForUser.Warning("sys_spu_printf_initialize(0x%x, 0x%x, 0x%x, 0x%x, 0x%x)", a1, a2, a3, a4, a5);
@@ -62,6 +71,7 @@ void sysPrxForUser_init()
 	sysPrxForUser.AddFunc(0xe6f2c1e7, sys_process_exit);
 	sysPrxForUser.AddFunc(0x2c847572, sys_process_atexitspawn);
 	sysPrxForUser.AddFunc(0x96328741, sys_process_at_Exitspawn);
+	sysPrxForUser.AddFunc(0x4f7172c9, sys_process_is_stack);
 
 	sysPrxForUser.AddFunc(0x24a1ea07, sys_ppu_thread_create);
 	sysPrxForUser.AddFunc(0x350d454e, sys_ppu_thread_get_id);
diff --git a/rpcs3/Emu/SysCalls/SysCalls.h b/rpcs3/Emu/SysCalls/SysCalls.h
index 7dfb90e6cf..e36d8d83b9 100644
--- a/rpcs3/Emu/SysCalls/SysCalls.h
+++ b/rpcs3/Emu/SysCalls/SysCalls.h
@@ -117,7 +117,6 @@ extern int sys_process_get_number_of_object(u32 object, mem32_t nump);
 extern int sys_process_get_id(u32 object, mem8_ptr_t buffer, u32 size, mem32_t set_size);
 extern int sys_process_get_paramsfo(mem8_ptr_t buffer);
 extern int sys_process_exit(int errorcode);
-extern int sys_process_is_stack(u32 addr); //TODO: Is this a lv2 SysCall? If so, where is its number?
 extern int sys_game_process_exitspawn(u32 path_addr, u32 argv_addr, u32 envp_addr,
 								u32 data, u32 data_size, int prio, u64 flags );
 
diff --git a/rpcs3/Emu/SysCalls/lv2/SC_Process.cpp b/rpcs3/Emu/SysCalls/lv2/SC_Process.cpp
index d65f554032..0fd91cbe8e 100644
--- a/rpcs3/Emu/SysCalls/lv2/SC_Process.cpp
+++ b/rpcs3/Emu/SysCalls/lv2/SC_Process.cpp
@@ -245,15 +245,6 @@ int sys_process_get_paramsfo(mem8_ptr_t buffer)
 	return CELL_OK;*/
 }
 
-int sys_process_is_stack(u32 p)
-{
-	PPCThread* CPU = GetCurrentPPCThread();
-	if (p >= CPU->GetStackAddr() && p <= CPU->GetStackAddr() + CPU->GetStackSize())
-		return 1;
-
-	return 0;
-}
-
 /*
 int SysCalls::lv2ProcessWaitForChild(PPUThread& CPU)
 {