diff --git a/lib/Checker/BuiltinFunctionChecker.cpp b/lib/Checker/BuiltinFunctionChecker.cpp
index 1387573..1a3e401 100644
--- a/lib/Checker/BuiltinFunctionChecker.cpp
+++ b/lib/Checker/BuiltinFunctionChecker.cpp
@@ -67,13 +67,11 @@
     DefinedOrUnknownSVal Size =
       cast<DefinedOrUnknownSVal>(state->getSVal(*(CE->arg_begin())));
 
-    ValueManager& ValMgr = C.getValueManager();
-    DefinedOrUnknownSVal Extent = R->getExtent(ValMgr);
-
-    SValBuilder& svalBuilder = ValMgr.getSValBuilder();
-    DefinedOrUnknownSVal ExtentMatchesSizeArg =
+    SValBuilder& svalBuilder = C.getSValBuilder();
+    DefinedOrUnknownSVal Extent = R->getExtent(svalBuilder);
+    DefinedOrUnknownSVal extentMatchesSizeArg =
       svalBuilder.evalEQ(state, Extent, Size);
-    state = state->assume(ExtentMatchesSizeArg, true);
+    state = state->assume(extentMatchesSizeArg, true);
 
     C.GenerateNode(state->BindExpr(CE, loc::MemRegionVal(R)));
     return true;