diff --git a/patches/react-native@0.86.0.patch b/patches/react-native@0.86.0.patch
index eb91618aa9..2fcc63c350 100644
--- a/patches/react-native@0.86.0.patch
+++ b/patches/react-native@0.86.0.patch
@@ -178,6 +178,19 @@ index 89b666dcf0258df0702c812600b685463128294c..2b1c3971f0c31a0d7a592b90170e4cc5
      val intersects = clippingRect.intersects(child.left, child.top, child.right, child.bottom)
      var needUpdateClippingRecursive = false
  
+diff --git a/ReactCommon/react/renderer/textlayoutmanager/platform/ios/react/renderer/textlayoutmanager/RCTFontUtils.mm b/ReactCommon/react/renderer/textlayoutmanager/platform/ios/react/renderer/textlayoutmanager/RCTFontUtils.mm
+index 9b04cad..b2b2762 100644
+--- a/ReactCommon/react/renderer/textlayoutmanager/platform/ios/react/renderer/textlayoutmanager/RCTFontUtils.mm
++++ b/ReactCommon/react/renderer/textlayoutmanager/platform/ios/react/renderer/textlayoutmanager/RCTFontUtils.mm
+@@ -361,7 +361,7 @@ UIFont *RCTFontWithFontProperties(RCTFontProperties fontProperties)
+       font = [UIFont fontWithName:fontProperties.family size:effectiveFontSize];
+       if (font != nullptr) {
+         fontNames = [UIFont fontNamesForFamilyName:font.familyName];
+-        fontWeight = (fontWeight != 0.0) ?: RCTGetFontWeight(font);
++        fontWeight = (fontWeight != 0.0) ? fontWeight : RCTGetFontWeight(font);
+       } else {
+         // Failback to system font.
+         font = RCTDefaultFontWithFontProperties(fontProperties);
 diff --git a/ReactCommon/react/renderer/textlayoutmanager/platform/ios/react/renderer/textlayoutmanager/RCTTextLayoutManager.mm b/ReactCommon/react/renderer/textlayoutmanager/platform/ios/react/renderer/textlayoutmanager/RCTTextLayoutManager.mm
 index ac55304..d99c8f4 100644
 --- a/ReactCommon/react/renderer/textlayoutmanager/platform/ios/react/renderer/textlayoutmanager/RCTTextLayoutManager.mm
diff --git a/patches/react-native@0.86.0.patch.md b/patches/react-native@0.86.0.patch.md
index d34a684958..d15b6b2e80 100644
--- a/patches/react-native@0.86.0.patch.md
+++ b/patches/react-native@0.86.0.patch.md
@@ -79,6 +79,16 @@ the prebuilt AAR from Maven Central instead, where this hunk (like any ReactAndr
 source change) has no effect - do not expect to see the fix in a local debug build unless
 you prebuild with EXPO_PUBLIC_ENV=production or add the substitution block manually.
 
+## RCTFontUtils.mm Patch - Custom font weights render as the heaviest face on New Arch
+
+**TODO: Remove after bumping React Native to a release that contains facebook/react-native#57483**
+(commit 918fb15bfe5f, on `main`; not in 0.86 and not yet released).
+
+Backport of the upstream one-liner: use a real ternary so the numeric weight is returned instead of
+the boolean. For a double, `(A != 0.0) ? A : B` is exactly equivalent to the original `A ?: B`.
+
+PR: https://github.com/facebook/react-native/pull/57483
+
 ## RCTTextLayoutManager.mm Patch - Text overflows instead of wrapping on the last line
 
 Issue: https://github.com/react/react-native/issues/53450#issuecomment-3298157830