diff --git a/LayoutTests/ChangeLog b/LayoutTests/ChangeLog
index f77d092..ffd7769 100644
--- a/LayoutTests/ChangeLog
+++ b/LayoutTests/ChangeLog
@@ -1,3 +1,16 @@
+2019-07-16  Wenson Hsieh  <wenson_hsieh@apple.com>
+
+        [Text autosizing] [iPadOS] Paragraph text on the front page of LinkedIn.com is not boosted
+        https://bugs.webkit.org/show_bug.cgi?id=199827
+        <rdar://problem/53152660>
+
+        Reviewed by Zalan Bujtas.
+
+        Add a new test case, inspired by paragraph text in a post on linkedin.com. This text should get autosized.
+
+        * fast/text-autosizing/ios/idempotentmode/idempotent-autosizing-candidates-expected.txt:
+        * fast/text-autosizing/ios/idempotentmode/idempotent-autosizing-candidates.html:
+
 2019-07-16  Rob Buis  <rbuis@igalia.com>
 
         Remove support for beforeload on link=prefetch
diff --git a/LayoutTests/fast/text-autosizing/ios/idempotentmode/idempotent-autosizing-candidates-expected.txt b/LayoutTests/fast/text-autosizing/ios/idempotentmode/idempotent-autosizing-candidates-expected.txt
index 464d944..cb7bf68 100644
--- a/LayoutTests/fast/text-autosizing/ios/idempotentmode/idempotent-autosizing-candidates-expected.txt
+++ b/LayoutTests/fast/text-autosizing/ios/idempotentmode/idempotent-autosizing-candidates-expected.txt
@@ -34,6 +34,8 @@
 PASS result is 12
 Checking target18:
 PASS result is 12
+Checking target19:
+PASS result is >= 13
 PASS successfullyParsed is true
 
 TEST COMPLETE
@@ -56,3 +58,4 @@
 Test 
 Test 
 Test
+Test
diff --git a/LayoutTests/fast/text-autosizing/ios/idempotentmode/idempotent-autosizing-candidates.html b/LayoutTests/fast/text-autosizing/ios/idempotentmode/idempotent-autosizing-candidates.html
index 8c588ef..8a74ad6 100644
--- a/LayoutTests/fast/text-autosizing/ios/idempotentmode/idempotent-autosizing-candidates.html
+++ b/LayoutTests/fast/text-autosizing/ios/idempotentmode/idempotent-autosizing-candidates.html
@@ -35,6 +35,7 @@
     <br>
     <span>Test</span>
 </div>
+<div style="background: green; line-height: 20px; max-height: 20px; font-size: 12px;" id="target19">Test</div>
 <script>
 let result;
 function check(name, shouldGetAutosized) {
@@ -77,6 +78,7 @@
 check("target16", true);
 check("target17", false);
 check("target18", false);
+check("target19", true);
 </script>
 <script src="../../../../resources/js-test-post.js"></script>
 </body>
diff --git a/Source/WebCore/ChangeLog b/Source/WebCore/ChangeLog
index 1c39ffc..c0d7c77 100644
--- a/Source/WebCore/ChangeLog
+++ b/Source/WebCore/ChangeLog
@@ -1,3 +1,24 @@
+2019-07-16  Wenson Hsieh  <wenson_hsieh@apple.com>
+
+        [Text autosizing] [iPadOS] Paragraph text on the front page of LinkedIn.com is not boosted
+        https://bugs.webkit.org/show_bug.cgi?id=199827
+        <rdar://problem/53152660>
+
+        Reviewed by Zalan Bujtas.
+
+        After r247467, we try to avoid boosting some text that might cause vertical overflow due to line height
+        increasing inside a container that expects a fixed integer number of lines. However, in the case of
+        linkedin.com, the line height specified is a fixed value of 26px, which greatly exceeds the specified font size
+        of 14px. In this case, it's safe to boost font size, since doing so would not affect the line height at all.
+
+        To handle this case, don't avoid text autosizing due to the "fixed number of lines" heuristic if the line height
+        is fixed, and is much larger than the font size.
+
+        Test: fast/text-autosizing/ios/idempotentmode/idempotent-autosizing-candidates.html
+
+        * rendering/style/TextSizeAdjustment.cpp:
+        (WebCore::AutosizeStatus::updateStatus):
+
 2019-07-16  Zalan Bujtas  <zalan@apple.com>
 
         [ContentChangeObserver] Cancel ongoing content observation when tap is failed/cancelled
diff --git a/Source/WebCore/rendering/style/TextSizeAdjustment.cpp b/Source/WebCore/rendering/style/TextSizeAdjustment.cpp
index 0528027..f13877d 100644
--- a/Source/WebCore/rendering/style/TextSizeAdjustment.cpp
+++ b/Source/WebCore/rendering/style/TextSizeAdjustment.cpp
@@ -53,6 +53,10 @@
         if (!style.lineHeight().isSpecified() || style.whiteSpace() == WhiteSpace::NoWrap)
             return false;
 
+        const float maximumDifferenceBetweenFixedLineHeightAndFontSize = 6;
+        if (style.lineHeight().isFixed() && style.lineHeight().value() - style.fontDescription().specifiedSize() > maximumDifferenceBetweenFixedLineHeightAndFontSize)
+            return false;
+
         Optional<Length> heightOrMaxHeightAsLength;
         if (style.height().isFixed() && style.maxHeight().isAuto())
             heightOrMaxHeightAsLength = style.height();