diff --git a/sys/i386/include/atomic.h b/sys/i386/include/atomic.h
index dae829b2c0f..5aca9fb1518 100644
--- a/sys/i386/include/atomic.h
+++ b/sys/i386/include/atomic.h
@@ -91,7 +91,7 @@ __mbu(void)
  */
 
 /*
- * Always use lock prefixes.  The result is slighly less optimal for
+ * Always use lock prefixes.  The result is slightly less optimal for
  * UP systems, but it matters less now, and sometimes UP is emulated
  * over SMP.
  *