diff --git a/lib/Basic/IdentifierTable.cpp b/lib/Basic/IdentifierTable.cpp
index f5b417c..690a1f5 100644
--- a/lib/Basic/IdentifierTable.cpp
+++ b/lib/Basic/IdentifierTable.cpp
@@ -95,7 +95,7 @@
     KEYNOCXX = 0x80,
     KEYBORLAND = 0x100,
     KEYOPENCL = 0x200,
-    KEYC1X = 0x400,
+    KEYC11 = 0x400,
     KEYARC = 0x800,
     KEYALL = 0x0fff
   };
@@ -124,7 +124,7 @@
   else if (LangOpts.AltiVec && (Flags & KEYALTIVEC)) AddResult = 2;
   else if (LangOpts.OpenCL && (Flags & KEYOPENCL)) AddResult = 2;
   else if (!LangOpts.CPlusPlus && (Flags & KEYNOCXX)) AddResult = 2;
-  else if (LangOpts.C1X && (Flags & KEYC1X)) AddResult = 2;
+  else if (LangOpts.C11 && (Flags & KEYC11)) AddResult = 2;
   // We treat bridge casts as objective-C keywords so we can warn on them
   // in non-arc mode.
   else if (LangOpts.ObjC2 && (Flags & KEYARC)) AddResult = 2;