diff --git a/screenfetch-dev b/screenfetch-dev
index f3c423b..7f42800 100755
--- a/screenfetch-dev
+++ b/screenfetch-dev
@@ -2078,7 +2078,17 @@ detectde () {
 
 			if [[ -z "$DE" || "$DE" = "Not Present" ]]; then
 				# fallback to checking $DESKTOP_SESSION
-				case "${DESKTOP_SESSION,,}" in
+				local _DESKTOP_SESSION=
+				if [[ ${BASH_VERSINFO[0]} -ge 4 ]]; then
+					if [[ ${BASH_VERSINFO[0]} -eq 4 && ${BASH_VERSINFO[1]} -gt 1 ]] || [[ ${BASH_VERSINFO[0]} -gt 4 ]]; then
+						_DESKTOP_SESSION=${DESKTOP_SESSION,,}
+					else
+						_DESKTOP_SESSION="$(tr '[:upper:]' '[:lower:]' <<< "${DESKTOP_SESSION}")"
+					fi
+				else
+					_DESKTOP_SESSION="$(tr '[:upper:]' '[:lower:]' <<< "${DESKTOP_SESSION}")"
+				fi
+				case "${_DESKTOP_SESSION}" in
 					'gnome'*)
 						DE="GNOME"
 						;;