diff --git a/lib/Analysis/DataStructure/DataStructure.cpp b/lib/Analysis/DataStructure/DataStructure.cpp
index 08ae687..f50c8ea 100644
--- a/lib/Analysis/DataStructure/DataStructure.cpp
+++ b/lib/Analysis/DataStructure/DataStructure.cpp
@@ -48,7 +48,7 @@
       // Because of this, find the biggest power of two that is bigger than
       // multiple to use as our real Multiple.
       unsigned RealMultiple = 2;
-      while (RealMultiple < Multiple) RealMultiple <<= 1;
+      while (RealMultiple <= Multiple) RealMultiple <<= 1;
 
       unsigned RealBound = MergeMap.size()/RealMultiple;
       assert(RealBound <= 128 && "Math didn't work out right");