diff --git a/python-argon2-cffi.changes b/python-argon2-cffi.changes
index cd4e400..7243bcf 100644
--- a/python-argon2-cffi.changes
+++ b/python-argon2-cffi.changes
@@ -1,3 +1,8 @@
+-------------------------------------------------------------------
+Wed Aug  8 14:02:08 UTC 2018 - tchvatal@suse.com
+
+- Do not use bundled argon2
+
 -------------------------------------------------------------------
 Wed Aug  8 13:36:02 UTC 2018 - tchvatal@suse.com
 
diff --git a/python-argon2-cffi.spec b/python-argon2-cffi.spec
index bd75154..02057ec 100644
--- a/python-argon2-cffi.spec
+++ b/python-argon2-cffi.spec
@@ -32,8 +32,10 @@ BuildRequires:  %{python_module pytest}
 BuildRequires:  %{python_module setuptools >= 6.0}
 BuildRequires:  %{python_module six}
 BuildRequires:  fdupes
+BuildRequires:  pkgconfig
 BuildRequires:  python-rpm-macros
 BuildRequires:  python2-enum34
+BuildRequires:  pkgconfig(libargon2)
 Requires:       python-cffi >= 1.0.0
 Requires:       python-six
 %ifpython2
@@ -48,6 +50,7 @@ The secure Argon2 password hashing algorithm that uses cffi to speed things up.
 %setup -q -n argon2_cffi-%{version}
 
 %build
+export ARGON2_CFFI_USE_SYSTEM=1
 %python_build
 
 %install