diff --git a/clang/lib/Checker/SVals.cpp b/clang/lib/Checker/SVals.cpp
index d756be7..7a99e86 100644
--- a/clang/lib/Checker/SVals.cpp
+++ b/clang/lib/Checker/SVals.cpp
@@ -200,15 +200,19 @@
   return isa<nonloc::ConcreteInt>(this) || isa<loc::ConcreteInt>(this);
 }
 
-bool SVal::isZeroConstant() const {
+bool SVal::isConstant(int I) const {
   if (isa<loc::ConcreteInt>(*this))
-    return cast<loc::ConcreteInt>(*this).getValue() == 0;
+    return cast<loc::ConcreteInt>(*this).getValue() == I;
   else if (isa<nonloc::ConcreteInt>(*this))
-    return cast<nonloc::ConcreteInt>(*this).getValue() == 0;
+    return cast<nonloc::ConcreteInt>(*this).getValue() == I;
   else
     return false;
 }
 
+bool SVal::isZeroConstant() const {
+  return isConstant(0);
+}
+
 
 //===----------------------------------------------------------------------===//
 // Transfer function dispatch for Non-Locs.