diff --git a/include/private/ui/RegionHelper.h b/include/private/ui/RegionHelper.h
index c7c3160..a22b2cb 100644
--- a/include/private/ui/RegionHelper.h
+++ b/include/private/ui/RegionHelper.h
@@ -27,10 +27,10 @@
 class region_operator
 {
 public:
-    typedef typename RECT::value_type TYPE;    
-    static const TYPE max_value = 0x7FFFFFF;
+    typedef typename RECT::value_type TYPE;
+    static const TYPE max_value = std::numeric_limits<TYPE>::max();
 
-    /* 
+    /*
      * Common boolean operations:
      * value is computed as 0b101 op 0b110
      *    other boolean operation are possible, simply compute