diff --git a/STTweetLabel/STTweetLabel.m b/STTweetLabel/STTweetLabel.m
index 54fa6be..dbd796a 100644
--- a/STTweetLabel/STTweetLabel.m
+++ b/STTweetLabel/STTweetLabel.m
@@ -439,7 +439,7 @@ - (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {
     if (!CGRectContainsPoint(_textView.frame, touchLocation))
         return;
 
-    int charIndex = (int)[self charIndexAtLocation:[[touches anyObject] locationInView:_textView]];
+    NSUInteger charIndex = [self charIndexAtLocation:[[touches anyObject] locationInView:_textView]];
     
     [_rangesOfHotWords enumerateObjectsUsingBlock:^(id obj, NSUInteger idx, BOOL *stop) {
         NSRange range = [[obj objectForKey:@"range"] rangeValue];
@@ -454,7 +454,12 @@ - (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {
 
 - (NSUInteger)charIndexAtLocation:(CGPoint)touchLocation {
     NSUInteger glyphIndex = [_layoutManager glyphIndexForPoint:touchLocation inTextContainer:_textView.textContainer];
-    return [_layoutManager characterIndexForGlyphAtIndex:glyphIndex];
+    CGRect boundingRect = [_layoutManager boundingRectForGlyphRange:NSMakeRange(glyphIndex, 1) inTextContainer:_textView.textContainer];
+    
+    if (CGRectContainsPoint(boundingRect, touchLocation))
+        return [_layoutManager characterIndexForGlyphAtIndex:glyphIndex];
+    else
+        return -1;
 }
 
 @end