diff --git a/src/kiri/init.js b/src/kiri/init.js
index 7f8b28b1..7a0c96fc 100644
--- a/src/kiri/init.js
+++ b/src/kiri/init.js
@@ -1778,7 +1778,7 @@ gapp.register("kiri.init", [], (root, exports) => {
             sliceSolidLayers:    uc.newInput(LANG.sl_lsld_s, {title:LANG.sl_lsld_l, convert:uc.toInt, modes:FDM}),
             sliceBottomLayers:   uc.newInput(LANG.sl_lbot_s, {title:LANG.sl_lbot_l, convert:uc.toInt, modes:FDM}),
             fdmSep:              uc.newBlank({class:"pop-sep", modes:FDM}),
-            sliceDetectThin:     uc.newSelect(LANG.ad_thin_s, {title: LANG.ad_thin_l, action: thinWallSave}, "thin"),
+            sliceDetectThin:     uc.newSelect(LANG.ad_thin_s, {title: LANG.ad_thin_l, action: thinWallSave, modes:FDM}, "thin"),
             sliceAdaptive:       uc.newBoolean(LANG.ad_adap_s, onBooleanClick, {title: LANG.ad_adap_l, modes:FDM, trigger: true}),
 
             laserOffset:         uc.newInput(LANG.ls_offs_s, {title:LANG.ls_offs_l, convert:uc.toFloat, modes:LASER}),