diff --git a/Software/PC_Application/LibreVNA-GUI/preferences.h b/Software/PC_Application/LibreVNA-GUI/preferences.h
index 7f71fd0..18d3264 100644
--- a/Software/PC_Application/LibreVNA-GUI/preferences.h
+++ b/Software/PC_Application/LibreVNA-GUI/preferences.h
@@ -140,7 +140,7 @@ public:
 
         struct {
             bool triangle;
-            unsigned int triangleSize;
+            int triangleSize;
             bool line;
             bool hide;
             double hidePercent;