diff --git a/lib/curl_ntlm_core.c b/lib/curl_ntlm_core.c
index ef9b7480b8..749b44e4a9 100644
--- a/lib/curl_ntlm_core.c
+++ b/lib/curl_ntlm_core.c
@@ -86,7 +86,6 @@
 #elif defined(USE_MBEDTLS)
 
 #  include <mbedtls/des.h>
-#  include "curl_md4.h"
 
 #elif defined(USE_SECTRANSP)
 
diff --git a/lib/curl_setup.h b/lib/curl_setup.h
index 4382aeed2e..c0861d79b7 100644
--- a/lib/curl_setup.h
+++ b/lib/curl_setup.h
@@ -659,10 +659,6 @@ int netware_init(void);
       defined(USE_OS400CRYPTO) || defined(USE_WIN32_CRYPTO) ||              \
       (defined(USE_WOLFSSL) && defined(HAVE_WOLFSSL_DES_ECB_ENCRYPT))
 #    define USE_CURL_NTLM_CORE
-#    if defined(USE_MBEDTLS)
-       /* Get definition of MBEDTLS_MD4_C */
-#      include <mbedtls/md4.h>
-#    endif
 #  endif
 #  if defined(USE_CURL_NTLM_CORE) || defined(USE_WINDOWS_SSPI)
 #    define USE_NTLM