diff --git a/chromium-123-shape_result-assert.patch b/chromium-123-shape_result-assert.patch
new file mode 100644
index 00000000..5b5d5cc7
--- /dev/null
+++ b/chromium-123-shape_result-assert.patch
@@ -0,0 +1,46 @@
+commit 4bdca157e7edfeb5b9c0ac77e3afbfe288f7f9cf
+Author: Stefan Zager <szager@chromium.org>
+Date:   Mon Feb 26 02:36:37 2024 +0000
+
+    Make SameSizeAsShapeResult robust against uncommon gn args
+    
+    When using uncommon build configurations, it's currently possible
+    to fail this assert due to details of struct field packing:
+    
+    ASSERT_SIZE(ShapeResult, SameSizeAsShapeResult);
+    
+    In particular, `cppgc_enable_pointer_compression = false` in args.gn
+    will trigger it.
+    
+    This changes makes the struct layout of SameSizeAsShapeResult more
+    closely match that of ShapeResult, which should make it harder to
+    fail the assert.
+    
+    Change-Id: I7406b0ac333303b6808807fa1eaf5cbecb85d858
+    Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5323558
+    Auto-Submit: Stefan Zager <szager@chromium.org>
+    Reviewed-by: Ian Kilpatrick <ikilpatrick@chromium.org>
+    Commit-Queue: Ian Kilpatrick <ikilpatrick@chromium.org>
+    Cr-Commit-Position: refs/heads/main@{#1265024}
+
+diff --git a/third_party/blink/renderer/platform/fonts/shaping/shape_result.cc b/third_party/blink/renderer/platform/fonts/shaping/shape_result.cc
+index 28aabc7d66cd8..a2bfdec2775e4 100644
+--- a/third_party/blink/renderer/platform/fonts/shaping/shape_result.cc
++++ b/third_party/blink/renderer/platform/fonts/shaping/shape_result.cc
+@@ -78,10 +78,13 @@ struct SameSizeAsRunInfo {
+ ASSERT_SIZE(ShapeResult::RunInfo, SameSizeAsRunInfo);
+ 
+ struct SameSizeAsShapeResult {
+-  Vector<int> vectors[2];
+-  UntracedMember<void*> members[2];
+   float width;
+-  unsigned integers[2];
++  UntracedMember<void*> deprecated_ink_bounds_;
++  Vector<int> runs_;
++  Vector<int> character_position_;
++  UntracedMember<void*> primary_font_;
++  unsigned start_index_;
++  unsigned num_characters_;
+   unsigned bitfields : 32;
+ };
+ 
diff --git a/chromium.spec b/chromium.spec
index 6b748a78..b9f63e90 100644
--- a/chromium.spec
+++ b/chromium.spec
@@ -557,7 +557,10 @@ Patch413: fix-unknown-warning-option-messages.diff
 Patch414: 0002-Highway-disable-128-bit-vsx.patch
 
 # upstream patches
+# 64kpage support on el8
 Patch500: chromium-122-el8-support-64kpage.patch
+# error: static assertion failed due to requirement '::WTF::internal::SizesEqual<72, 64>::value': ShapeResult should stay small 
+Patch501: chromium-123-shape_result-assert.patch
 
 # Use chromium-latest.py to generate clean tarball from released build tarballs, found here:
 # http://build.chromium.org/buildbot/official/
@@ -1314,6 +1317,8 @@ udev.
 %endif
 %endif
 
+%patch -P501 -p1 -b .shape_result-assert
+
 # Change shebang in all relevant files in this directory and all subdirectories
 # See `man find` for how the `-exec command {} +` syntax works
 find -type f \( -iname "*.py" \) -exec sed -i '1s=^#! */usr/bin/\(python\|env python\)[23]\?=#!%{__python3}=' {} +