diff --git a/escher/src/text_field.cpp b/escher/src/text_field.cpp
index 952c3090d..f84d83bf5 100644
--- a/escher/src/text_field.cpp
+++ b/escher/src/text_field.cpp
@@ -233,6 +233,8 @@ size_t TextField::ContentView::deleteSelection() {
    * are invalid */
   m_selectionStart = nullptr;
   m_selectionEnd = nullptr;
+  assert(removedLength <= m_currentDraftTextLength);
+  m_currentDraftTextLength -= removedLength;
   return removedLength;
 }