diff --git a/clang/lib/Sema/SemaCodeComplete.cpp b/clang/lib/Sema/SemaCodeComplete.cpp
--- a/clang/lib/Sema/SemaCodeComplete.cpp
+++ b/clang/lib/Sema/SemaCodeComplete.cpp
@@ -6000,7 +6000,6 @@
   return getParamType(SemaRef, Candidates, CurrentArg);
 }
 
-#include <iostream>
 static FunctionProtoTypeLoc GetPrototypeLoc(Expr *Fn) {
   if (const auto *T = Fn->getType().getTypePtr()->getAs<TypedefType>()) {
     const auto *D = T->getDecl();