diff --git a/rpcs3/Emu/Cell/lv2/lv2.cpp b/rpcs3/Emu/Cell/lv2/lv2.cpp
index 2013ee8b23..657977a0ca 100644
--- a/rpcs3/Emu/Cell/lv2/lv2.cpp
+++ b/rpcs3/Emu/Cell/lv2/lv2.cpp
@@ -195,7 +195,7 @@ const std::array<ppu_function_t, 1024> s_ppu_syscall_table
 	BIND_FUNC(sys_time_get_current_time),                   //145 (0x091)
 	null_func,//BIND_FUNC(sys_time_get_system_time),        //146 (0x092)  ROOT
 	BIND_FUNC(sys_time_get_timebase_frequency),             //147 (0x093)
-	null_func,//BIND_FUNC(_sys_rwlock_trywlock)             //148 (0x094)
+	BIND_FUNC(_sys_rwlock_trywlock),                        //148 (0x094)
 	null_func,                                              //149 (0x095)  UNS
 	BIND_FUNC(sys_raw_spu_create_interrupt_tag),            //150 (0x096)
 	BIND_FUNC(sys_raw_spu_set_int_mask),                    //151 (0x097)
diff --git a/rpcs3/Emu/Cell/lv2/sys_rwlock.cpp b/rpcs3/Emu/Cell/lv2/sys_rwlock.cpp
index 79351653a9..0fe0fb36d1 100644
--- a/rpcs3/Emu/Cell/lv2/sys_rwlock.cpp
+++ b/rpcs3/Emu/Cell/lv2/sys_rwlock.cpp
@@ -225,9 +225,9 @@ error_code sys_rwlock_runlock(ppu_thread& ppu, u32 rw_lock_id)
 		// Remove one reader
 		const s64 _old = rwlock->owner.fetch_op([](s64& val)
 		{
-			if (val < 0)
+			if (val < -1)
 			{
-				val++;
+				val += 2;
 			}
 		});
 
diff --git a/rpcs3/Emu/Cell/lv2/sys_rwlock.h b/rpcs3/Emu/Cell/lv2/sys_rwlock.h
index d99ba60e86..af53cf1819 100644
--- a/rpcs3/Emu/Cell/lv2/sys_rwlock.h
+++ b/rpcs3/Emu/Cell/lv2/sys_rwlock.h
@@ -55,3 +55,5 @@ error_code sys_rwlock_runlock(ppu_thread& ppu, u32 rw_lock_id);
 error_code sys_rwlock_wlock(ppu_thread& ppu, u32 rw_lock_id, u64 timeout);
 error_code sys_rwlock_trywlock(ppu_thread& ppu, u32 rw_lock_id);
 error_code sys_rwlock_wunlock(ppu_thread& ppu, u32 rw_lock_id);
+
+constexpr auto _sys_rwlock_trywlock = sys_rwlock_trywlock;