diff --git a/src/MissionManager/QGCMapPolygonVisuals.qml b/src/MissionManager/QGCMapPolygonVisuals.qml
index daf0ad72e23f038b2fa0c5889fcf98ebee1b1a0c..d24ff4c64bf53df66bfe8a63b51bbac662c5dc02 100644
--- a/src/MissionManager/QGCMapPolygonVisuals.qml
+++ b/src/MissionManager/QGCMapPolygonVisuals.qml
@@ -453,6 +453,7 @@ Item {
                         id:                 radiusField
                         text:               _circleRadius.toFixed(2)
                         onEditingFinished:  setRadiusFromDialog()
+                        inputMethodHints:   Qt.ImhFormattedNumbersOnly
                     }
                 }