diff --git a/install.sh b/install.sh
index 9064b66..736d6cb 100755
--- a/install.sh
+++ b/install.sh
@@ -336,13 +336,13 @@ function disable_ipv6() {
         else
             echo "IPv6 already disabled."
         fi
-    fi
-
-    if ! sudo grep "ipv6.disable=1" /boot/grub2/grub.cfg; then
-        sudo grubby --args=ipv6.disable=1 --update-kernel=ALL
-        sudo grub2-mkconfig -o /boot/grub2/grub.cfg
-    else
-        echo "IPv6 already disabled."
+    elif test -f /etc/redhat-release; then
+        if ! sudo grep "ipv6.disable=1" /boot/grub2/grub.cfg; then
+            sudo grubby --args=ipv6.disable=1 --update-kernel=ALL
+            sudo grub2-mkconfig -o /boot/grub2/grub.cfg
+        else
+            echo "IPv6 already disabled."
+        fi
     fi
 }