diff --git a/clang/docs/PCHInternals.html b/clang/docs/PCHInternals.html
index 05278f37e0a5..7fed5bab84e1 100644
--- a/clang/docs/PCHInternals.html
+++ b/clang/docs/PCHInternals.html
@@ -541,7 +541,7 @@ it depends on), reparsing of that source file can use the precompiled
preamble and start parsing after the #includes, so parsing time is
proportional to the size of the source file (rather than all of its
includes). However, the compilation of that translation unit
-may already uses a precompiled header: in this case, Clang will create
+may already use a precompiled header: in this case, Clang will create
the precompiled preamble as a chained precompiled header that refers
to the original precompiled header. This drastically reduces the time
needed to serialize the precompiled preamble for use in reparsing.