--- polyml.5.5.1-orig/libpolyml/memmgr.cpp	2013-07-10 22:56:07.000000000 +1000
+++ polyml.5.5.1/libpolyml/memmgr.cpp	2014-02-10 14:08:51.866219101 +1100
@@ -80,7 +80,7 @@
     // Allocate the heap itself.
     size_t iSpace = size*sizeof(PolyWord);
     bottom  =
-        (PolyWord*)osMemoryManager->Allocate(iSpace, PERMISSION_READ|PERMISSION_WRITE|PERMISSION_EXEC);
+        (PolyWord*)osMemoryManager->Allocate(iSpace, PERMISSION_READ|PERMISSION_EXEC);
 
     if (bottom == 0)
         return false;
@@ -359,7 +359,7 @@
         // Allocate the memory itself.
         size_t iSpace = size*sizeof(PolyWord);
         space->bottom  =
-            (PolyWord*)osMemoryManager->Allocate(iSpace, PERMISSION_READ|PERMISSION_WRITE|PERMISSION_EXEC);
+            (PolyWord*)osMemoryManager->Allocate(iSpace, PERMISSION_READ|PERMISSION_EXEC);
 
         if (space->bottom == 0)
         {
@@ -728,7 +728,7 @@
             LocalMemSpace *space = lSpaces[i];
             if (! space->isMutable)
                 osMemoryManager->SetPermissions(space->bottom, (char*)space->top - (char*)space->bottom,
-                    on ? PERMISSION_READ|PERMISSION_EXEC : PERMISSION_READ|PERMISSION_EXEC|PERMISSION_WRITE);
+                    on ? PERMISSION_READ|PERMISSION_EXEC : PERMISSION_READ|PERMISSION_WRITE);
         }
     }
 }