diff --git a/libc/test/src/math/tanpif16_test.cpp b/libc/test/src/math/tanpif16_test.cpp
index 629ba963135c0..04d1f713574a1 100644
--- a/libc/test/src/math/tanpif16_test.cpp
+++ b/libc/test/src/math/tanpif16_test.cpp
@@ -1,4 +1,4 @@
-//===-- Exhaustive test for cospif16 --------------------------------------===//
+//===-- Exhaustive test for tanpif16 --------------------------------------===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
 // See https://llvm.org/LICENSE.txt for license information.