diff --git a/lib/IRGen/IRGenMangler.cpp b/lib/IRGen/IRGenMangler.cpp
index 19b02f3352d..3a95a78b1ff 100644
--- a/lib/IRGen/IRGenMangler.cpp
+++ b/lib/IRGen/IRGenMangler.cpp
@@ -1,4 +1,4 @@
-//===--- IRGenMangler.h - mangling of IRGen symbols -----------------------===//
+//===--- IRGenMangler.cpp - mangling of IRGen symbols ---------------------===//
 //
 // This source file is part of the Swift.org open source project
 //
diff --git a/lib/SILOptimizer/Transforms/AssumeSingleThreaded.cpp b/lib/SILOptimizer/Transforms/AssumeSingleThreaded.cpp
index 345478270b0..087b85d52f7 100644
--- a/lib/SILOptimizer/Transforms/AssumeSingleThreaded.cpp
+++ b/lib/SILOptimizer/Transforms/AssumeSingleThreaded.cpp
@@ -1,4 +1,4 @@
-//===--- AssumeSingleThreaded.cpp - Assume single-threaded execution  ---===//
+//===--- AssumeSingleThreaded.cpp - Assume single-threaded execution  -----===//
 //
 // This source file is part of the Swift.org open source project
 //