diff --git a/js/kiri-driver-cam.js b/js/kiri-driver-cam.js
index d1c2716c..c69783ab 100644
--- a/js/kiri-driver-cam.js
+++ b/js/kiri-driver-cam.js
@@ -1388,7 +1388,7 @@ var gs_kiri_cam = exports;
             stripComments = gcodes.gcodeStrip || false,
             cmdToolChange = gcodes.gcodeChange || [ "M6 T{tool}" ],
             cmdSpindle = gcodes.gcodeSpindle || [ "M3 S{speed}" ],
-            cmdDwell = gcodes.gcodeDwell || [ "G4 S{time}" ],
+            cmdDwell = gcodes.gcodeDwell || [ "G4 P{time}" ],
             bounds = widget.getCamBounds(settings),
             bed = settings.device,
             spro = settings.process,
diff --git a/js/kiri.js b/js/kiri.js
index 0878bbaa..ee2b42ee 100644
--- a/js/kiri.js
+++ b/js/kiri.js
@@ -262,7 +262,7 @@ self.kiri.license = exports.LICENSE;
                 gcodeFan: "",       // FDM fan command
                 gcodeTrack: "",     // FDM progress command
                 gcodeLayer: "",     // FDM layer output
-                gcodeDwell: ["G4 S{time}"],     // CAM dwell script
+                gcodeDwell: ["G4 P{time}"],     // CAM dwell script
                 gcodeChange: ["M6 T{tool}"],    // CAM tool change script
                 gcodeSpindle: ["M3 S{speed}"],  // CAM spindle speed
                 gcodeFExt: "",      // CAM file extension