diff --git a/clang/lib/Analysis/PrintfFormatString.cpp b/clang/lib/Analysis/PrintfFormatString.cpp
index d2bcbb0..35c620a 100644
--- a/clang/lib/Analysis/PrintfFormatString.cpp
+++ b/clang/lib/Analysis/PrintfFormatString.cpp
@@ -311,8 +311,11 @@
         return ArgTypeResult();
     }
   
-  if (CS.isDoubleArg())
+  if (CS.isDoubleArg()) {
+    if (LM == AsLongDouble)
+      return Ctx.LongDoubleTy;
     return Ctx.DoubleTy;
+  }
 
   // FIXME: Handle other cases.
   return ArgTypeResult();