diff --git a/thinkfan-confgen b/thinkfan-confgen
index ddb7202..bc24bf5 100755
--- a/thinkfan-confgen
+++ b/thinkfan-confgen
@@ -8,6 +8,10 @@ main() {
     shift
   fi
 
+  if [[ -f /etc/default/thinkfan-confgen ]]; then
+    source /etc/default/thinkfan-confgen
+  fi
+
   : "${THINKFAN_LOWER_BOUND:=30}"
   : "${THINKFAN_STEP:=4}"