diff --git a/lld/MachO/SyntheticSections.h b/lld/MachO/SyntheticSections.h
--- a/lld/MachO/SyntheticSections.h
+++ b/lld/MachO/SyntheticSections.h
@@ -9,6 +9,7 @@
 #ifndef LLD_MACHO_SYNTHETIC_SECTIONS_H
 #define LLD_MACHO_SYNTHETIC_SECTIONS_H
 
+#include "Config.h"
 #include "ExportTrie.h"
 #include "InputSection.h"
 #include "OutputSection.h"
@@ -66,7 +67,7 @@
 public:
   PageZeroSection();
   bool isHidden() const override { return true; }
-  size_t getSize() const override { return ImageBase; }
+  size_t getSize() const override { return PageZeroSize; }
   uint64_t getFileSize() const override { return 0; }
   void writeTo(uint8_t *buf) const override {}
 };
diff --git a/lld/MachO/Target.h b/lld/MachO/Target.h
--- a/lld/MachO/Target.h
+++ b/lld/MachO/Target.h
@@ -24,6 +24,7 @@
   // deprecating 32-bit apps.
   WordSize = 8,
   PageSize = 4096,
+  PageZeroSize = 1ull << 32, // XXX should be 4096 for 32-bit targets
   ImageBase = 4096,
   MaxAlignmentPowerOf2 = 32,
 };
diff --git a/lld/test/MachO/segments.s b/lld/test/MachO/segments.s
--- a/lld/test/MachO/segments.s
+++ b/lld/test/MachO/segments.s
@@ -9,8 +9,8 @@
 # CHECK:        Cmd: LC_SEGMENT_64
 # CHECK:        Name: __PAGEZERO
 # CHECK:        Size: 72
-# CHECK:        vmaddr:
-# CHECK:        vmsize:
+# CHECK:        vmaddr: 0x0
+# CHECK:        vmsize: 0x100000000
 # CHECK:        fileoff: 0
 # CHECK:        filesize: 0
 ## The kernel won't execute a binary with the wrong protections for __PAGEZERO.
@@ -23,7 +23,7 @@
 # CHECK:        Cmd: LC_SEGMENT_64
 # CHECK:        Name: __TEXT
 # CHECK:        Size: 152
-# CHECK:        vmaddr:
+# CHECK:        vmaddr: 0x100000000
 # CHECK:        vmsize:
 ## dyld3 assumes that the __TEXT segment starts from the file header
 # CHECK:        fileoff: 0
diff --git a/lld/test/MachO/x86-64-reloc-signed.s b/lld/test/MachO/x86-64-reloc-signed.s
--- a/lld/test/MachO/x86-64-reloc-signed.s
+++ b/lld/test/MachO/x86-64-reloc-signed.s
@@ -4,18 +4,18 @@
 # RUN: llvm-objdump -D %t | FileCheck %s
 
 # CHECK:      <_main>:
-# CHECK-NEXT:   movl {{.*}}  # 2000 <_s>
+# CHECK-NEXT:   movl {{.*}}  # 100001000 <_s>
 # CHECK-NEXT:   callq {{.*}}
-# CHECK-NEXT:   movl {{.*}}  # 2002 <_s+0x2>
+# CHECK-NEXT:   movl {{.*}}  # 100001002 <_s+0x2>
 # CHECK-NEXT:   callq {{.*}}
-# CHECK-NEXT:   movb {{.*}}  # 2000 <_s>
+# CHECK-NEXT:   movb {{.*}}  # 100001000 <_s>
 # CHECK-NEXT:   callq {{.*}}
 # CHECK:      <__not_text>:
-# CHECK-NEXT:   movl {{.*}}  # 2005
+# CHECK-NEXT:   movl {{.*}}  # 100001005
 # CHECK-NEXT:   callq {{.*}}
-# CHECK-NEXT:   movl {{.*}}  # 2007
+# CHECK-NEXT:   movl {{.*}}  # 100001007
 # CHECK-NEXT:   callq {{.*}}
-# CHECK-NEXT:   movb {{.*}}  # 2005
+# CHECK-NEXT:   movb {{.*}}  # 100001005
 # CHECK-NEXT:   callq {{.*}}
 
 .section __TEXT,__text
diff --git a/lld/test/MachO/x86-64-reloc-unsigned.s b/lld/test/MachO/x86-64-reloc-unsigned.s
--- a/lld/test/MachO/x86-64-reloc-unsigned.s
+++ b/lld/test/MachO/x86-64-reloc-unsigned.s
@@ -3,9 +3,9 @@
 # RUN: lld -flavor darwinnew -o %t %t.o
 # RUN: llvm-objdump --full-contents %t | FileCheck %s
 # CHECK: Contents of section foo:
-# CHECK:  2000 08200000 00000000
+# CHECK:  100001000 08100000 01000000
 # CHECK: Contents of section bar:
-# CHECK:  2008 11311111 01000000
+# CHECK:  100001008 11211111 02000000
 
 .globl _main, _foo, _bar