diff --git a/app/gui/main.qml b/app/gui/main.qml
index 3a204f94..54aefe8f 100644
--- a/app/gui/main.qml
+++ b/app/gui/main.qml
@@ -69,9 +69,19 @@ ApplicationWindow {
         }
     }
   
+    // It would be better to use TextMetrics here, but it always lays out
+    // the text slightly more compactly than real Text does in ToolTip,
+    // causing unexpected line breaks to be inserted
+    Text {
+        id: tooltipTextLayoutHelper
+        visible: false
+        font: ToolTip.toolTip.font
+        text: ToolTip.toolTip.text
+    }
+
     // This configures the maximum width of the singleton attached QML ToolTip. If left unconstrained,
     // it will never insert a line break and just extend on forever.
-    ToolTip.toolTip.contentWidth: ToolTip.toolTip.implicitContentWidth < 400 ? ToolTip.toolTip.implicitContentWidth : 400
+    ToolTip.toolTip.contentWidth: Math.min(tooltipTextLayoutHelper.width, 400)
 
     function goBack() {
         if (clearOnBack) {