diff --git a/lib/Checker/ArrayBoundChecker.cpp b/lib/Checker/ArrayBoundChecker.cpp
index 98345bd..cf2a2fc 100644
--- a/lib/Checker/ArrayBoundChecker.cpp
+++ b/lib/Checker/ArrayBoundChecker.cpp
@@ -51,7 +51,7 @@
     return;
 
   // Get the index of the accessed element.
-  DefinedOrUnknownSVal &Idx = cast<DefinedOrUnknownSVal>(ER->getIndex());
+  DefinedOrUnknownSVal Idx = cast<DefinedOrUnknownSVal>(ER->getIndex());
 
   const GRState *state = C.getState();
 
diff --git a/lib/Checker/CStringChecker.cpp b/lib/Checker/CStringChecker.cpp
index 9ea572f..d61fdd4 100644
--- a/lib/Checker/CStringChecker.cpp
+++ b/lib/Checker/CStringChecker.cpp
@@ -193,7 +193,7 @@
   DefinedOrUnknownSVal Size = cast<DefinedOrUnknownSVal>(Extent);
 
   // Get the index of the accessed element.
-  DefinedOrUnknownSVal &Idx = cast<DefinedOrUnknownSVal>(ER->getIndex());
+  DefinedOrUnknownSVal Idx = cast<DefinedOrUnknownSVal>(ER->getIndex());
 
   const GRState *StInBound = state->AssumeInBound(Idx, Size, true);
   const GRState *StOutBound = state->AssumeInBound(Idx, Size, false);
diff --git a/lib/Checker/ReturnPointerRangeChecker.cpp b/lib/Checker/ReturnPointerRangeChecker.cpp
index a9eb5ce..0e7a5cf 100644
--- a/lib/Checker/ReturnPointerRangeChecker.cpp
+++ b/lib/Checker/ReturnPointerRangeChecker.cpp
@@ -59,7 +59,7 @@
   if (!ER)
     return;
 
-  DefinedOrUnknownSVal &Idx = cast<DefinedOrUnknownSVal>(ER->getIndex());
+  DefinedOrUnknownSVal Idx = cast<DefinedOrUnknownSVal>(ER->getIndex());
 
   // FIXME: All of this out-of-bounds checking should eventually be refactored
   // into a common place.