diff --git a/clang/lib/Frontend/PCHReaderDecl.cpp b/clang/lib/Frontend/PCHReaderDecl.cpp
index 933034e..1ef0441 100644
--- a/clang/lib/Frontend/PCHReaderDecl.cpp
+++ b/clang/lib/Frontend/PCHReaderDecl.cpp
@@ -666,6 +666,7 @@
       assert(0 && "Unknown attribute!");
       break;
     STRING_ATTR(Alias);
+    SIMPLE_ATTR(AlignMac68k);
     UNSIGNED_ATTR(Aligned);
     SIMPLE_ATTR(AlwaysInline);
     SIMPLE_ATTR(AnalyzerNoReturn);