diff --git a/Userland/Libraries/LibCore/MimeData.cpp b/Userland/Libraries/LibCore/MimeData.cpp
index 7e08ebea1bd..dea65ff5884 100644
--- a/Userland/Libraries/LibCore/MimeData.cpp
+++ b/Userland/Libraries/LibCore/MimeData.cpp
@@ -31,14 +31,16 @@ Vector<URL> MimeData::urls() const
     return urls;
 }
 
-void MimeData::set_urls(Vector<URL> const& urls)
+ErrorOr<void> MimeData::set_urls(Vector<URL> const& urls)
 {
     StringBuilder builder;
     for (auto& url : urls) {
         builder.append(url.to_deprecated_string());
         builder.append('\n');
     }
-    set_data("text/uri-list", builder.to_byte_buffer());
+    set_data("text/uri-list", TRY(builder.try_to_byte_buffer()));
+
+    return {};
 }
 
 DeprecatedString MimeData::text() const
diff --git a/Userland/Libraries/LibCore/MimeData.h b/Userland/Libraries/LibCore/MimeData.h
index 849e02edfe1..8947fb7a8f3 100644
--- a/Userland/Libraries/LibCore/MimeData.h
+++ b/Userland/Libraries/LibCore/MimeData.h
@@ -34,7 +34,7 @@ public:
     // Convenience helpers for "text/uri-list"
     bool has_urls() const { return has_format("text/uri-list"); }
     Vector<URL> urls() const;
-    void set_urls(Vector<URL> const&);
+    ErrorOr<void> set_urls(Vector<URL> const&);
 
     HashMap<DeprecatedString, ByteBuffer> const& all_data() const { return m_data; }