Index: clang/lib/Lex/PPDirectives.cpp
===================================================================
--- clang/lib/Lex/PPDirectives.cpp
+++ clang/lib/Lex/PPDirectives.cpp
@@ -2639,7 +2639,7 @@
   SmallVector<IdentifierInfo*, 32> Parameters;
 
   while (true) {
-    LexUnexpandedToken(Tok);
+    LexUnexpandedNonComment(Tok);
     switch (Tok.getKind()) {
     case tok::r_paren:
       // Found the end of the parameter list.
@@ -2660,7 +2660,7 @@
       }
 
       // Lex the token after the identifier.
-      LexUnexpandedToken(Tok);
+      LexUnexpandedNonComment(Tok);
       if (Tok.isNot(tok::r_paren)) {
         Diag(Tok, diag::err_pp_missing_rparen_in_macro_def);
         return true;
@@ -2694,7 +2694,7 @@
       Parameters.push_back(II);
 
       // Lex the token after the identifier.
-      LexUnexpandedToken(Tok);
+      LexUnexpandedNonComment(Tok);
 
       switch (Tok.getKind()) {
       default:          // #define X(A B
@@ -2710,7 +2710,7 @@
         Diag(Tok, diag::ext_named_variadic_macro);
 
         // Lex the token after the identifier.
-        LexUnexpandedToken(Tok);
+        LexUnexpandedNonComment(Tok);
         if (Tok.isNot(tok::r_paren)) {
           Diag(Tok, diag::err_pp_missing_rparen_in_macro_def);
           return true;
Index: clang/test/Preprocessor/comment_save_macro.c
===================================================================
--- clang/test/Preprocessor/comment_save_macro.c
+++ clang/test/Preprocessor/comment_save_macro.c
@@ -1,13 +1,28 @@
 // RUN: %clang_cc1 -E -C %s | FileCheck -check-prefix=CHECK-C -strict-whitespace %s
 // CHECK-C: boo bork bar // zot
+// CHECK-C: ( 0 );
+// CHECK-C: ( 0,1,2 );
+// CHECK-C: ( 0,1,2 );
 
 // RUN: %clang_cc1 -E -CC %s | FileCheck -check-prefix=CHECK-CC -strict-whitespace %s
 // CHECK-CC: boo bork /* blah*/ bar // zot
+// CHECK-CC: (/**/0/**/);
+// CHECK-CC: (/**/0,1,2/**/);
+// CHECK-CC: (/**/0,1,2/**/);
 
 // RUN: %clang_cc1 -E %s | FileCheck -strict-whitespace %s
 // CHECK: boo bork bar
+// CHECK: ( 0 );
+// CHECK: ( 0,1,2 );
+// CHECK: ( 0,1,2 );
 
 
 #define FOO bork // blah
 boo FOO bar // zot
+#define M(/**/x/**/) (/**/x/**/)
+M(0);
+#define M2(/**/.../**/) (/**/__VA_ARGS__/**/)
+M2(0,1,2);
+#define M3(/**/x.../**/) (/**/x/**/)
+M3(0,1,2);