diff --git a/liquidprompt.bash b/liquidprompt.bash
index 326e1d0..1c9f62f 100755
--- a/liquidprompt.bash
+++ b/liquidprompt.bash
@@ -49,11 +49,11 @@ unset bash bmajor bminor
 # CONFIGURATION #
 #################
 
-LP_BATTERY_THRESHOLD=75
-LP_LOAD_THRESHOLD=60
-LP_PATH_LENGTH=35
-LP_PATH_KEEP=2
-LP_REVERSE=0
+LP_BATTERY_THRESHOLD=${LP_BATTERY_THRESHOLD:-75}
+LP_LOAD_THRESHOLD=${LP_LOAD_THRESHOLD:-60}
+LP_PATH_LENGTH=${LP_PATH_LENGTH:-35}
+LP_PATH_KEEP=${LP_PATH_KEEP:-2}
+LP_REVERSE=${LP_REVERSE:-0}
 
 source ~/.liquidpromptrc 2> /dev/null