--- old/src/hotspot/os/windows/gc/z/zMapper_windows.hpp	2020-05-18 23:08:26.844576665 +0200
+++ new/src/hotspot/os/windows/gc/z/zMapper_windows.hpp	2020-05-18 23:08:26.584568231 +0200
@@ -75,7 +75,7 @@
 
   // Map a view of the file handle and replace the placeholder covering the
   // given virtual address range
-  static void map_view_replace_placeholder(HANDLE file_handle, uintptr_t file_offset, uintptr_t addr, size_t size);
+  static bool map_view_replace_placeholder(HANDLE file_handle, uintptr_t file_offset, uintptr_t addr, size_t size);
 
   // Unmap the view and reinstate a placeholder covering the given virtual
   // address range