diff --git a/clang/lib/Format/TokenAnnotator.cpp b/clang/lib/Format/TokenAnnotator.cpp
--- a/clang/lib/Format/TokenAnnotator.cpp
+++ b/clang/lib/Format/TokenAnnotator.cpp
@@ -1892,7 +1892,7 @@
     if (!NextToken ||
         NextToken->isOneOf(tok::arrow, tok::equal, tok::kw_const,
                            tok::kw_restrict, tok::kw_volatile,
-                           tok::kw_noexcept) ||
+                           tok::kw___attribute, tok::kw_noexcept) ||
         (NextToken->is(tok::l_brace) && !NextToken->getNextNonComment()))
       return TT_PointerOrReference;
 
diff --git a/clang/unittests/Format/FormatTest.cpp b/clang/unittests/Format/FormatTest.cpp
--- a/clang/unittests/Format/FormatTest.cpp
+++ b/clang/unittests/Format/FormatTest.cpp
@@ -8059,6 +8059,8 @@
   verifyIndependentOfContext("MACRO(A *volatile a);");
   verifyIndependentOfContext("MACRO(A *__volatile a);");
   verifyIndependentOfContext("MACRO(A *__volatile__ a);");
+  verifyIndependentOfContext("MACRO(A *__attribute__((foo)) a);");
+  verifyIndependentOfContext("MACRO(A *__attribute((foo)) a);");
   verifyIndependentOfContext("MACRO('0' <= c && c <= '9');");
   verifyFormat("void f() { f(float{1}, a * a); }");
   // FIXME: Is there a way to make this work?