diff --git a/perl-Crypt-OpenSSL-Random.spec b/perl-Crypt-OpenSSL-Random.spec
index 6a50ac2..54d605c 100644
--- a/perl-Crypt-OpenSSL-Random.spec
+++ b/perl-Crypt-OpenSSL-Random.spec
@@ -42,7 +42,7 @@ library's pseudo-random number generator
 %setup -q -n %{cpan_name}-%{version}
 
 %build
-%{__perl} Makefile.PL INSTALLDIRS=vendor OPTIMIZE="%{optimize}"
+%{__perl} Makefile.PL INSTALLDIRS=vendor OPTIMIZE="$RPM_OPT_FLAGS"
 %{__make} %{?_smp_mflags}
 
 %check