diff --git a/src/ui/entry.cpp b/src/ui/entry.cpp
index 4e0634128..d137b82f3 100644
--- a/src/ui/entry.cpp
+++ b/src/ui/entry.cpp
@@ -251,7 +251,7 @@ gfx::Rect Entry::getEntryTextBounds() const
   return onGetEntryTextBounds();
 }
 
-gfx::Rect Entry::getCharBoxBounds(const int i)
+gfx::Rect Entry::getCharBoxBounds(const int i) const
 {
   ASSERT(i >= 0 && i < int(m_boxes.size()));
   if (i >= 0 && i < int(m_boxes.size()))
diff --git a/src/ui/entry.h b/src/ui/entry.h
index e4e96473f..139feab7d 100644
--- a/src/ui/entry.h
+++ b/src/ui/entry.h
@@ -76,7 +76,7 @@ public:
   obs::signal<void()> Change;
 
 protected:
-  gfx::Rect getCharBoxBounds(int i);
+  gfx::Rect getCharBoxBounds(int i) const;
 
   // Events
   bool onProcessMessage(Message* msg) override;