diff --git a/Eigen/src/Core/util/Memory.h b/Eigen/src/Core/util/Memory.h
index 741f35a0d..67053db62 100644
--- a/Eigen/src/Core/util/Memory.h
+++ b/Eigen/src/Core/util/Memory.h
@@ -523,7 +523,7 @@ template<typename T> struct smart_memmove_helper<T,true> {
 template<typename T> struct smart_memmove_helper<T,false> {
   static inline void run(const T* start, const T* end, T* target)
   { 
-    if (IntPtr(target) < IntPtr(start))
+    if (UIntPtr(target) < UIntPtr(start))
     {
       std::copy(start, end, target);
     }