diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..126bc53
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
+# Files
+*~
\ No newline at end of file
diff --git a/acmlib.sh b/acmlib.sh
index 16523e6..92d9efc 100644
--- a/acmlib.sh
+++ b/acmlib.sh
@@ -295,7 +295,7 @@ check_os_is_centos () {
 }
 
 check_os_is_ubuntu () {
-    grep -iq '^ID *= *ubuntu' /etc/os-release
+    [ -s /etc/lsb-release ] && grep -iq '^DISTRIB_ID *= *Ubuntu' /etc/lsb-release
 }
 
 require_supported_os () {