diff --git a/data/schema.cfg b/data/schema.cfg
index 4c9b3dcac01d..aa1e95c4ca84 100644
--- a/data/schema.cfg
+++ b/data/schema.cfg
@@ -5,7 +5,7 @@
     string="re ^[^\x7f\x80]+$"
     integer="re ^(\+|-)?[0-9]+$"
     float="re ^(\+|-)?[0-9]+(\.[0-9]*)?$"
-    boolean="enum true,false,yes,no,on,off"
+    boolean="enum true,false,yes,no"
     pathimage="re ^([a-zA-Z0-9_\-.+]+/)*[a-zA-Z0-9_\-.+]+(~(TC|RC|PAL|FL|GS|CS|CROP|SCALE|BL|O|R|G|B|NOP|RIGHT)\(.*\))*$" # TODO: Some 'path' must be changed to 'pathimage'
     path="re ^[a-zA-Z0-9_\-.+\/]*[a-zA-Z0-9_\-.+]$"
     direction="enum n,ne,se,s,sw,nw"