diff --git a/YYText/YYTextView.m b/YYText/YYTextView.m
index 1dbad5d3..3c3d6e31 100644
--- a/YYText/YYTextView.m
+++ b/YYText/YYTextView.m
@@ -2421,7 +2421,7 @@ - (void)setFrame:(CGRect)frame {
     CGSize oldSize = self.bounds.size;
     [super setFrame:frame];
     CGSize newSize = self.bounds.size;
-    BOOL changed = _innerContainer.isVerticalForm ? (oldSize.height != newSize.height) : (oldSize.width != newSize.width);
+    BOOL changed = _innerContainer.isVerticalForm ? CGSizeEqualToSize(oldSize, newSize) : (oldSize.width != newSize.width);
     if (changed) {
         [self _updateInnerContainerSize];
         [self _commitUpdate];