diff --git a/core/sync/extended.odin b/core/sync/extended.odin
index 24f7c096c..2cca6f961 100644
--- a/core/sync/extended.odin
+++ b/core/sync/extended.odin
@@ -202,7 +202,7 @@ benaphore_lock :: proc(b: ^Benaphore) {
 }
 
 benaphore_try_lock :: proc(b: ^Benaphore) -> bool {
-	v, _ := atomic_compare_exchange_strong_explicit(&b.counter, 1, 0, .Acquire, .Acquire)
+	v, _ := atomic_compare_exchange_strong_explicit(&b.counter, 0, 1, .Acquire, .Acquire)
 	return v == 0
 }
 
@@ -243,7 +243,7 @@ recursive_benaphore_try_lock :: proc(b: ^Recursive_Benaphore) -> bool {
 		atomic_add_explicit(&b.counter, 1, .Acquire)
 	}
 
-	if v, _ := atomic_compare_exchange_strong_explicit(&b.counter, 1, 0, .Acquire, .Acquire); v != 0 {
+	if v, _ := atomic_compare_exchange_strong_explicit(&b.counter, 0, 1, .Acquire, .Acquire); v != 0 {
 		return false
 	}
 	// inside the lock
diff --git a/core/sync/primitives_internal.odin b/core/sync/primitives_internal.odin
index 15967d45e..de9aca991 100644
--- a/core/sync/primitives_internal.odin
+++ b/core/sync/primitives_internal.odin
@@ -10,7 +10,7 @@ when #config(ODIN_SYNC_RECURSIVE_MUTEX_USE_FUTEX, true) {
 	_recursive_mutex_lock :: proc(m: ^Recursive_Mutex) {
 		tid := Futex(current_thread_id())
 		for {
-			prev_owner := atomic_compare_exchange_strong_explicit(&m.impl.owner, tid, 0, .Acquire, .Acquire)
+			prev_owner := atomic_compare_exchange_strong_explicit(&m.impl.owner, 0, tid, .Acquire, .Acquire)
 			switch prev_owner {
 			case 0, tid:
 				m.impl.recursion += 1
@@ -36,7 +36,7 @@ when #config(ODIN_SYNC_RECURSIVE_MUTEX_USE_FUTEX, true) {
 
 	_recursive_mutex_try_lock :: proc(m: ^Recursive_Mutex) -> bool {
 		tid := Futex(current_thread_id())
-		prev_owner := atomic_compare_exchange_strong_explicit(&m.impl.owner, tid, 0, .Acquire, .Acquire)
+		prev_owner := atomic_compare_exchange_strong_explicit(&m.impl.owner, 0, tid, .Acquire, .Acquire)
 		switch prev_owner {
 		case 0, tid:
 			m.impl.recursion += 1
diff --git a/core/sync/sema_internal.odin b/core/sync/sema_internal.odin
index 8cf157708..d265caa81 100644
--- a/core/sync/sema_internal.odin
+++ b/core/sync/sema_internal.odin
@@ -25,7 +25,7 @@ when #config(ODIN_SYNC_SEMA_USE_FUTEX, true) {
 				futex_wait(&s.impl.count, u32(original_count))
 				original_count = s.impl.count
 			}
-			if original_count == atomic_compare_exchange_strong(&s.impl.count, original_count-1, original_count) {
+			if original_count == atomic_compare_exchange_strong(&s.impl.count, original_count, original_count-1) {
 				return
 			}
 		}
@@ -49,7 +49,7 @@ when #config(ODIN_SYNC_SEMA_USE_FUTEX, true) {
 				}
 				original_count = s.impl.count
 			}
-			if original_count == atomic_compare_exchange_strong(&s.impl.count, original_count-1, original_count) {
+			if original_count == atomic_compare_exchange_strong(&s.impl.count, original_count, original_count-1) {
 				return true
 			}
 		}