diff --git a/src/kiri-mode/fdm/export.js b/src/kiri-mode/fdm/export.js
index ae45f554..cd930934 100644
--- a/src/kiri-mode/fdm/export.js
+++ b/src/kiri-mode/fdm/export.js
@@ -169,6 +169,13 @@ FDM.export = function(print, online, ondone, ondebug) {
             end: Infinity,
             iter: oloops - 1
         });
+    } else if (oloops < 0) {
+        // if oloops negative, loop entire part to infinity
+        rloops.push({
+            start: layers[0].slice.index,
+            end: Infinity,
+            iter: 0
+        });
     }
     if (process.ranges) {
         // collect loops from ranges and synth range array
diff --git a/src/kiri/init.js b/src/kiri/init.js
index 7a0c96fc..23f1020e 100644
--- a/src/kiri/init.js
+++ b/src/kiri/init.js
@@ -1953,7 +1953,7 @@ gapp.register("kiri.init", [], (root, exports) => {
             arcTolerance:        uc.newInput(LANG.ad_arct_s, {title:LANG.ad_arct_l, bound:uc.bound(0,1.0), convert:uc.toFloat, modes:FDM, show:() => { return isDanger() && isNotBelt() }}),
             antiBacklash:        uc.newInput(LANG.ad_abkl_s, {title:LANG.ad_abkl_l, bound:uc.bound(0,3), convert:uc.toInt, modes:FDM}),
             fdmSep:              uc.newBlank({class:"pop-sep", modes:FDM}),
-            outputLoops:         uc.newInput(LANG.ag_loop_s, {title:LANG.ag_loop_l, convert:uc.toInt, bound:uc.bound(0,1000), modes:FDM, show:isBelt}),
+            outputLoops:         uc.newInput(LANG.ag_loop_s, {title:LANG.ag_loop_l, convert:uc.toInt, bound:uc.bound(-1,1000), modes:FDM, show:isBelt}),
             outputPurgeTower:    uc.newInput(LANG.ad_purg_s, {title:LANG.ad_purg_l, convert:uc.toInt, bound:uc.bound(0,1000), modes:FDM}),
 
             // SLA