diff --git a/lib/ui/text/paragraph.cc b/lib/ui/text/paragraph.cc
index 5680735b6019b134a1545f4d95123ed83833c794..2618c3f08406a388a369f46d4597847244330fc7 100644
--- a/lib/ui/text/paragraph.cc
+++ b/lib/ui/text/paragraph.cc
@@ -140,7 +140,7 @@ Dart_Handle Paragraph::getLineBoundary(unsigned offset) {
   int line_start = -1;
   int line_end = -1;
   for (txt::LineMetrics& line : metrics) {
-    if (offset >= line.start_index && offset < line.end_index) {
+    if (offset >= line.start_index && offset <= line.end_index) {
       line_start = line.start_index;
       line_end = line.end_index;
       break;