diff --git a/Utilities/mutex.h b/Utilities/mutex.h
index cbe7599ef3..c77489f5d9 100644
--- a/Utilities/mutex.h
+++ b/Utilities/mutex.h
@@ -121,7 +121,7 @@ public:
 
 	void unlock_hle()
 	{
-		const u32 value = atomic_storage<u32>::fetch_add_hle_rel(m_value.raw(), -c_one);
+		const u32 value = atomic_storage<u32>::fetch_add_hle_rel(m_value.raw(), 0u - c_one);
 
 		if (UNLIKELY(value != c_one))
 		{