diff --git a/lib/curl_ntlm_core.c b/lib/curl_ntlm_core.c
index 14a9b3d0c8..b7d67598ee 100644
--- a/lib/curl_ntlm_core.c
+++ b/lib/curl_ntlm_core.c
@@ -116,6 +116,7 @@
 #include "curl_hmac.h"
 #include "curlx/warnless.h"
 #include "curl_md4.h"
+#include "vauth/vauth.h"
 
 #ifdef USE_CURL_DES_SET_ODD_PARITY
 /*
diff --git a/lib/curl_ntlm_core.h b/lib/curl_ntlm_core.h
index 2e23d44bf5..0d2aa21862 100644
--- a/lib/curl_ntlm_core.h
+++ b/lib/curl_ntlm_core.h
@@ -28,8 +28,6 @@
 
 #ifdef USE_CURL_NTLM_CORE
 
-#include "vauth/vauth.h"
-
 struct ntlmdata;
 
 /* Helpers to generate function byte arguments in little endian order */