diff --git a/firefox.spec b/firefox.spec
index f5a25cb..bb3d5f8 100644
--- a/firefox.spec
+++ b/firefox.spec
@@ -452,6 +452,8 @@ BuildRequires:    perl-interpreter
 BuildRequires:    gcc-c++
 BuildRequires:    xmlto
 %endif
+#RHEL9
+BuildRequires:    perl-interpreter
 
 Requires:       mozilla-filesystem
 Requires:       p11-kit-trust