diff --git a/perl-Test-Differences.spec b/perl-Test-Differences.spec
index 8f49ff1..31e8fa7 100644
--- a/perl-Test-Differences.spec
+++ b/perl-Test-Differences.spec
@@ -1,10 +1,10 @@
 # RPM version needs 4 digits after the decimal to preserve upgrade path
 %global module_version 0.64
-%global RPM_version %(echo %{module_version} | perl -p -e 's/(.*)/sprintf("%.4f", $1)/e')
+%global RPM_version %{module_version}00
 
 Name:           perl-Test-Differences
 Version:        %{RPM_version}
-Release:        3%{?dist}
+Release:        4%{?dist}
 Summary:        Test strings and data structures and show differences if not OK
 Group:          Development/Libraries
 License:        GPL+ or Artistic
@@ -68,6 +68,9 @@ rm -rf %{buildroot}
 %{_mandir}/man3/Test::Differences.3*
 
 %changelog
+* Fri Jul 22 2016 Petr Pisar <ppisar@redhat.com> - 0.6400-4
+- Adjust package version computation to SRPM build root witout perl
+
 * Sun May 15 2016 Jitka Plesnikova <jplesnik@redhat.com> - 0.6400-3
 - Perl 5.24 rebuild