diff --git a/Userland/Libraries/LibGfx/GIFLoader.cpp b/Userland/Libraries/LibGfx/GIFLoader.cpp
index 3ed4066195..f1d716a485 100644
--- a/Userland/Libraries/LibGfx/GIFLoader.cpp
+++ b/Userland/Libraries/LibGfx/GIFLoader.cpp
@@ -228,9 +228,9 @@ public:
 private:
     void init_code_table()
     {
-        m_code_table.clear();
+        m_code_table.ensure_capacity(m_table_capacity);
         for (u16 i = 0; i < m_table_capacity; ++i) {
-            m_code_table.append({ (u8)i });
+            m_code_table.unchecked_append({ (u8)i });
         }
         m_original_code_table = m_code_table;
     }