--- a/sharedmemory/computesegmentsize.cc
+++ b/sharedmemory/computesegmentsize.cc
@@ -28,10 +28,10 @@
 
     maxMemory <<= sizeUnit;
 
-    double a = static_cast<double>(PAGESIZE) * PAGESIZE / sizeof(Entry);
+    double a = static_cast<double>(BC_PAGE_SIZE) * BC_PAGE_SIZE / sizeof(Entry);
     
     double b = -static_cast<double>(sizeof(SharedSegment) - sizeof(Entry)) 
-                * PAGESIZE / sizeof(Entry);
+                * BC_PAGE_SIZE / sizeof(Entry);
 
     double c = -maxMemory;
     
@@ -39,7 +39,7 @@
                         ceil((-b + sqrt(b * b - 4 * a * c)) / (2 * a))
                     );
 
-    size_t segmentSize = factor * PAGESIZE;
+    size_t segmentSize = factor * BC_PAGE_SIZE;
 
     *nBlocks = (segmentSize - (sizeof(SharedSegment) - sizeof(Entry))) 
                     / sizeof(Entry);
--- a/sharedmemory/sharedmemory
+++ b/sharedmemory/sharedmemory
@@ -27,7 +27,7 @@
     friend std::ostream &operator<<(std::ostream &out, 
                                     SharedMemory const &mem);
 
-    enum { PAGESIZE = 1 << 12 };
+    enum { BC_PAGE_SIZE = 1 << 12 };
 
         // updated by the non-default constructors.
     int d_id = -1;                      // id of SharedSegment