diff --git a/build-prep.sh b/build-prep.sh
index 8db959e1..7d012a08 100755
--- a/build-prep.sh
+++ b/build-prep.sh
@@ -8,7 +8,7 @@ ARCH="$(rpm -E '%_arch')"
 RELEASE="$(rpm -E '%fedora')"
 
 # Modularity repositories are not available on Fedora 39 and above, so don't try to disable them
-if [[ "${FEDORA_VERSION}" -le 38 ]]; then
+if [[ "${FEDORA_MAJOR_VERSION}" -le 38 ]]; then
     sed -i 's@enabled=1@enabled=0@g' /etc/yum.repos.d/fedora-{cisco-openh264,modular,updates-modular}.repo
 else
     sed -i 's@enabled=1@enabled=0@g' /etc/yum.repos.d/fedora-cisco-openh264.repo