diff --git a/nx/source/kernel/semaphore.c b/nx/source/kernel/semaphore.c
index 328e8414..8b334121 100644
--- a/nx/source/kernel/semaphore.c
+++ b/nx/source/kernel/semaphore.c
@@ -33,5 +33,6 @@ bool semaphoreTryWait(Semaphore *s) {
         s->count--;
         success = true;
     }
+    mutexUnlock(&s->mutex);
     return success;
 }