diff --git a/tools/python/xen/migration/libxc.py b/tools/python/xen/migration/libxc.py
index 85a78f463f..6fd3f6dcdf 100644
--- a/tools/python/xen/migration/libxc.py
+++ b/tools/python/xen/migration/libxc.py
@@ -14,6 +14,10 @@ from struct import calcsize, unpack
 
 from xen.migration.verify import StreamError, RecordError, VerifyBase
 
+# In Python3 long type have been merged into int, 1L syntax is no longer valid
+if sys.version_info > (3,):
+    long = int
+
 # Image Header
 IHDR_FORMAT = "!QIIHHI"
 
@@ -83,23 +87,23 @@ rec_type_to_str = {
 
 # page_data
 PAGE_DATA_FORMAT             = "II"
-PAGE_DATA_PFN_MASK           = (1L << 52) - 1
-PAGE_DATA_PFN_RESZ_MASK      = ((1L << 60) - 1) & ~((1L << 52) - 1)
+PAGE_DATA_PFN_MASK           = (long(1) << 52) - 1
+PAGE_DATA_PFN_RESZ_MASK      = ((long(1) << 60) - 1) & ~((long(1) << 52) - 1)
 
 # flags from xen/public/domctl.h: XEN_DOMCTL_PFINFO_* shifted by 32 bits
 PAGE_DATA_TYPE_SHIFT         = 60
-PAGE_DATA_TYPE_LTABTYPE_MASK = (0x7L << PAGE_DATA_TYPE_SHIFT)
-PAGE_DATA_TYPE_LTAB_MASK     = (0xfL << PAGE_DATA_TYPE_SHIFT)
-PAGE_DATA_TYPE_LPINTAB       = (0x8L << PAGE_DATA_TYPE_SHIFT) # Pinned pagetable
+PAGE_DATA_TYPE_LTABTYPE_MASK = (long(0x7) << PAGE_DATA_TYPE_SHIFT)
+PAGE_DATA_TYPE_LTAB_MASK     = (long(0xf) << PAGE_DATA_TYPE_SHIFT)
+PAGE_DATA_TYPE_LPINTAB       = (long(0x8) << PAGE_DATA_TYPE_SHIFT) # Pinned pagetable
 
-PAGE_DATA_TYPE_NOTAB         = (0x0L << PAGE_DATA_TYPE_SHIFT) # Regular page
-PAGE_DATA_TYPE_L1TAB         = (0x1L << PAGE_DATA_TYPE_SHIFT) # L1 pagetable
-PAGE_DATA_TYPE_L2TAB         = (0x2L << PAGE_DATA_TYPE_SHIFT) # L2 pagetable
-PAGE_DATA_TYPE_L3TAB         = (0x3L << PAGE_DATA_TYPE_SHIFT) # L3 pagetable
-PAGE_DATA_TYPE_L4TAB         = (0x4L << PAGE_DATA_TYPE_SHIFT) # L4 pagetable
-PAGE_DATA_TYPE_BROKEN        = (0xdL << PAGE_DATA_TYPE_SHIFT) # Broken
-PAGE_DATA_TYPE_XALLOC        = (0xeL << PAGE_DATA_TYPE_SHIFT) # Allocate-only
-PAGE_DATA_TYPE_XTAB          = (0xfL << PAGE_DATA_TYPE_SHIFT) # Invalid
+PAGE_DATA_TYPE_NOTAB         = (long(0x0) << PAGE_DATA_TYPE_SHIFT) # Regular page
+PAGE_DATA_TYPE_L1TAB         = (long(0x1) << PAGE_DATA_TYPE_SHIFT) # L1 pagetable
+PAGE_DATA_TYPE_L2TAB         = (long(0x2) << PAGE_DATA_TYPE_SHIFT) # L2 pagetable
+PAGE_DATA_TYPE_L3TAB         = (long(0x3) << PAGE_DATA_TYPE_SHIFT) # L3 pagetable
+PAGE_DATA_TYPE_L4TAB         = (long(0x4) << PAGE_DATA_TYPE_SHIFT) # L4 pagetable
+PAGE_DATA_TYPE_BROKEN        = (long(0xd) << PAGE_DATA_TYPE_SHIFT) # Broken
+PAGE_DATA_TYPE_XALLOC        = (long(0xe) << PAGE_DATA_TYPE_SHIFT) # Allocate-only
+PAGE_DATA_TYPE_XTAB          = (long(0xf) << PAGE_DATA_TYPE_SHIFT) # Invalid
 
 # x86_pv_info
 X86_PV_INFO_FORMAT        = "BBHI"