diff --git a/config_help.txt b/config_help.txt
index 94471d27cf..32bdbe4d84 100644
--- a/config_help.txt
+++ b/config_help.txt
@@ -163,6 +163,8 @@ Build options:
   -reduce-exports ...... Reduce amount of exported symbols [auto]
   -reduce-relocations .. Reduce amount of relocations [auto] (Unix only)
 
+  -relocatable ......... Enable the Qt installation to be relocated [auto]
+
   -plugin-manifests .... Embed manifests into plugins [no] (Windows only)
   -static-runtime ...... With -static, use static runtime [no] (Windows only)