diff --git a/upip/metadata.txt b/upip/metadata.txt
index e37979b3..ef149fcc 100644
--- a/upip/metadata.txt
+++ b/upip/metadata.txt
@@ -1,6 +1,6 @@
 srctype = micropython-lib
 type = module
-version = 0.5.2
+version = 0.5.3
 author = Paul Sokolovsky
 extra_modules = upip__libc, upip_errno, upip_gzip, upip_os, upip_os_path, upip_stat, upip_utarfile
 desc = Simple package manager for MicroPython.
diff --git a/upip/setup.py b/upip/setup.py
index 923d8af9..a16ee219 100644
--- a/upip/setup.py
+++ b/upip/setup.py
@@ -6,7 +6,7 @@ from setuptools import setup
 
 
 setup(name='micropython-upip',
-      version='0.5.2',
+      version='0.5.3',
       description='Simple package manager for MicroPython.',
       long_description='Simple package manager for MicroPython, targetting to be self-hosted (but not yet there). Compatible only with packages without custom setup.py code.',
       url='https://github.com/micropython/micropython/issues/405',
diff --git a/upip/upip_utarfile.py b/upip/upip_utarfile.py
index e9ebde18..2c3ab7f5 100644
--- a/upip/upip_utarfile.py
+++ b/upip/upip_utarfile.py
@@ -56,7 +56,7 @@ class TarFile:
             if not buf:
                 return None
 
-            h = uctypes.struct(TAR_HEADER, uctypes.addressof(buf), uctypes.LITTLE_ENDIAN)
+            h = uctypes.struct(uctypes.addressof(buf), TAR_HEADER, uctypes.LITTLE_ENDIAN)
 
             # Empty block means end of archive
             if h.name[0] == 0: