diff --git a/common-functions.sh b/common-functions.sh
index 0ea94f0..298aba5 100644
--- a/common-functions.sh
+++ b/common-functions.sh
@@ -5,9 +5,13 @@
 
 # Initializes $installer and $distrib
 if hash dnf 2>/dev/null; then
-	# Fedora, CentOS
+	# Fedora, CentOS with dnf installed
 	installer="dnf install --allowerasing"
 	distrib="redhat"
+elif hash yum 2>/dev/null; then
+	# CentOS
+	installer="yum install"
+	distrib="redhat"
 elif hash zypper 2>/dev/null; then
 	# OpenSUSE
 	installer="zypper install"