Index: include/clang/Sema/CodeCompleteOptions.h
===================================================================
--- include/clang/Sema/CodeCompleteOptions.h
+++ include/clang/Sema/CodeCompleteOptions.h
@@ -36,7 +36,8 @@
   unsigned IncludeBriefComments : 1;
 
   /// Hint whether to load data from the external AST to provide full results.
-  /// If false, namespace-level declarations from the preamble may be omitted.
+  /// If false, namespace-level declarations and macros from the preamble may be
+  /// omitted.
   unsigned LoadExternal : 1;
 
   /// Include results after corrections (small fix-its), e.g. change '.' to '->'
Index: lib/Sema/SemaCodeComplete.cpp
===================================================================
--- lib/Sema/SemaCodeComplete.cpp
+++ lib/Sema/SemaCodeComplete.cpp
@@ -3302,14 +3302,14 @@
 }
 
 static void AddMacroResults(Preprocessor &PP, ResultBuilder &Results,
-                            bool IncludeUndefined,
+                            bool LoadExternal, bool IncludeUndefined,
                             bool TargetTypeIsPointer = false) {
   typedef CodeCompletionResult Result;
 
   Results.EnterNewScope();
 
-  for (Preprocessor::macro_iterator M = PP.macro_begin(),
-                                 MEnd = PP.macro_end();
+  for (Preprocessor::macro_iterator M = PP.macro_begin(LoadExternal),
+                                    MEnd = PP.macro_end(LoadExternal);
        M != MEnd; ++M) {
     auto MD = PP.getMacroDefinition(M->first);
     if (IncludeUndefined || MD) {
@@ -3325,7 +3325,6 @@
   }
 
   Results.ExitScope();
-
 }
 
 static void AddPrettyFunctionResults(const LangOptions &LangOpts,
@@ -3609,7 +3608,7 @@
   }
 
   if (CodeCompleter->includeMacros())
-    AddMacroResults(PP, Results, false);
+    AddMacroResults(PP, Results, CodeCompleter->loadExternal(), false);
 
   HandleCodeCompleteResults(this, CodeCompleter, Results.getCompletionContext(),
                             Results.data(),Results.size());
@@ -3747,7 +3746,8 @@
     AddPrettyFunctionResults(getLangOpts(), Results);
 
   if (CodeCompleter->includeMacros())
-    AddMacroResults(PP, Results, false, PreferredTypeIsPointer);
+    AddMacroResults(PP, Results, CodeCompleter->loadExternal(), false,
+                    PreferredTypeIsPointer);
   HandleCodeCompleteResults(this, CodeCompleter, Results.getCompletionContext(),
                             Results.data(), Results.size());
 }
@@ -4370,7 +4370,7 @@
   Results.ExitScope();
 
   if (CodeCompleter->includeMacros()) {
-    AddMacroResults(PP, Results, false);
+    AddMacroResults(PP, Results, CodeCompleter->loadExternal(), false);
   }
   HandleCodeCompleteResults(this, CodeCompleter, Results.getCompletionContext(),
                             Results.data(), Results.size());
@@ -4686,7 +4686,7 @@
     AddPrettyFunctionResults(getLangOpts(), Results);
 
   if (CodeCompleter->includeMacros())
-    AddMacroResults(PP, Results, false);
+    AddMacroResults(PP, Results, CodeCompleter->loadExternal(), false);
 
   HandleCodeCompleteResults(this, CodeCompleter, Results.getCompletionContext(),
                             Results.data(),Results.size());
@@ -5720,7 +5720,7 @@
                      CodeCompleter->loadExternal());
 
   if (CodeCompleter->includeMacros())
-    AddMacroResults(PP, Results, false);
+    AddMacroResults(PP, Results, CodeCompleter->loadExternal(), false);
 
   HandleCodeCompleteResults(this, CodeCompleter, Results.getCompletionContext(),
                             Results.data(), Results.size());
@@ -5949,10 +5949,9 @@
   Results.ExitScope();
 
   if (CodeCompleter->includeMacros())
-    AddMacroResults(PP, Results, false);
+    AddMacroResults(PP, Results, CodeCompleter->loadExternal(), false);
   HandleCodeCompleteResults(this, CodeCompleter, Results.getCompletionContext(),
                             Results.data(), Results.size());
-
 }
 
 void Sema::CodeCompleteObjCSuperMessage(Scope *S, SourceLocation SuperLoc,
@@ -7965,7 +7964,9 @@
                         CodeCompletionContext::CCC_PreprocessorExpression);
 
   if (!CodeCompleter || CodeCompleter->includeMacros())
-    AddMacroResults(PP, Results, true);
+    AddMacroResults(PP, Results,
+                    CodeCompleter ? CodeCompleter->loadExternal() : false,
+                    true);
 
     // defined (<macro>)
   Results.EnterNewScope();
@@ -8030,7 +8031,9 @@
   }
 
   if (!CodeCompleter || CodeCompleter->includeMacros())
-    AddMacroResults(PP, Builder, true);
+    AddMacroResults(PP, Builder,
+                    CodeCompleter ? CodeCompleter->loadExternal() : false,
+                    true);
 
   Results.clear();
   Results.insert(Results.end(),