diff --git a/src/libstd/sync/semaphore.rs b/src/libstd/sync/semaphore.rs
index 8f08c840c218b..ac5ce298c5c6f 100644
--- a/src/libstd/sync/semaphore.rs
+++ b/src/libstd/sync/semaphore.rs
@@ -13,7 +13,7 @@
                       of resources is currently unclear",
             issue = "27798")]
 #![rustc_deprecated(since = "1.7.0",
-                    reason = "easily confused with system sempahores and not \
+                    reason = "easily confused with system semaphores and not \
                               used enough to pull its weight")]
 #![allow(deprecated)]