diff --git a/lib/Analysis/PointerTracking.cpp b/lib/Analysis/PointerTracking.cpp
index 8da07e7..ce7ac89 100644
--- a/lib/Analysis/PointerTracking.cpp
+++ b/lib/Analysis/PointerTracking.cpp
@@ -231,7 +231,7 @@
   // this should be safe for the same reason its safe for SCEV.
   PointerTracking &PT = *const_cast<PointerTracking*>(this);
   for (inst_iterator I=inst_begin(*FF), E=inst_end(*FF); I != E; ++I) {
-    if (!isa<PointerType>(I->getType()))
+    if (!I->getType()->isPointerTy())
       continue;
     Value *Base;
     const SCEV *Limit, *Offset;