diff --git a/lib/Sema/SemaExpr.cpp b/lib/Sema/SemaExpr.cpp
index 8df023f..1abbe80 100644
--- a/lib/Sema/SemaExpr.cpp
+++ b/lib/Sema/SemaExpr.cpp
@@ -70,7 +70,7 @@
 
 /// ActOnIdentifierExpr - The parser read an identifier in expression context,
 /// validate it per-C99 6.5.1.  HasTrailingLParen indicates whether this
-/// identifier is used in an function call context.
+/// identifier is used in a function call context.
 Sema::ExprResult Sema::ActOnIdentifierExpr(Scope *S, SourceLocation Loc,
                                            IdentifierInfo &II,
                                            bool HasTrailingLParen) {