diff --git a/perl-Crypt-URandom.spec b/perl-Crypt-URandom.spec
index 47bb24f..ce7d747 100644
--- a/perl-Crypt-URandom.spec
+++ b/perl-Crypt-URandom.spec
@@ -46,6 +46,7 @@ Requires:       perl-Test-Harness
 %if %{with perl_Crypt_URandom_enables_optional_test}
 Requires:       perl(Encode)
 %endif
+Requires:       perl(POSIX)
 
 %description tests
 Tests from %{name}. Execute them