diff --git a/string/macbuild/string.mcp b/string/macbuild/string.mcp
index 251d85e2561..419061a5968 100644
Binary files a/string/macbuild/string.mcp and b/string/macbuild/string.mcp differ
diff --git a/string/public/MANIFEST b/string/public/MANIFEST
index 72cf91b0de1..9378e5daed2 100644
--- a/string/public/MANIFEST
+++ b/string/public/MANIFEST
@@ -26,6 +26,7 @@ nsAWritableString.h
 nsBufferHandle.h
 nsBufferHandleUtils.h
 nsCharTraits.h
+nsFragmentedString.h
 nsPrintfCString.h
 nsPrivateSharableString.h
 nsReadableUtils.h
diff --git a/xpcom/string/macbuild/string.mcp b/xpcom/string/macbuild/string.mcp
index 251d85e2561..419061a5968 100644
Binary files a/xpcom/string/macbuild/string.mcp and b/xpcom/string/macbuild/string.mcp differ
diff --git a/xpcom/string/public/MANIFEST b/xpcom/string/public/MANIFEST
index 72cf91b0de1..9378e5daed2 100644
--- a/xpcom/string/public/MANIFEST
+++ b/xpcom/string/public/MANIFEST
@@ -26,6 +26,7 @@ nsAWritableString.h
 nsBufferHandle.h
 nsBufferHandleUtils.h
 nsCharTraits.h
+nsFragmentedString.h
 nsPrintfCString.h
 nsPrivateSharableString.h
 nsReadableUtils.h