diff --git a/Userland/Libraries/LibCrypto/Authentication/GHash.h b/Userland/Libraries/LibCrypto/Authentication/GHash.h
index eb8837a03f..5924fcec7a 100644
--- a/Userland/Libraries/LibCrypto/Authentication/GHash.h
+++ b/Userland/Libraries/LibCrypto/Authentication/GHash.h
@@ -58,8 +58,6 @@ public:
     TagType process(ReadonlyBytes aad, ReadonlyBytes cipher);
 
 private:
-    inline void transform(ReadonlyBytes, ReadonlyBytes);
-
     u32 m_key[4];
 };