diff --git a/lib/Analysis/DataStructure/BottomUpClosure.cpp b/lib/Analysis/DataStructure/BottomUpClosure.cpp
index d1c96261dcc..ef3bf387ef9 100644
--- a/lib/Analysis/DataStructure/BottomUpClosure.cpp
+++ b/lib/Analysis/DataStructure/BottomUpClosure.cpp
@@ -33,7 +33,8 @@ static inline bool isCompleteNode(DSNode *N) {
       GlobalValue &FI = cast<Function>(*Callees[i]);
       if (FI.getName() != "printf"  && FI.getName() != "sscanf" &&
           FI.getName() != "fprintf" && FI.getName() != "open" &&
-          FI.getName() != "sprintf" && FI.getName() != "fputs")
+          FI.getName() != "sprintf" && FI.getName() != "fputs" &&
+          FI.getName() != "fscanf")
         return false;  // External function found...
     }
   return true;  // otherwise ok