diff --git a/lib/curl_sasl.c b/lib/curl_sasl.c
index 9317fc3936..119fb9b25a 100644
--- a/lib/curl_sasl.c
+++ b/lib/curl_sasl.c
@@ -36,7 +36,8 @@
 #include "curl_setup.h"
 
 #if !defined(CURL_DISABLE_IMAP) || !defined(CURL_DISABLE_SMTP) || \
-  !defined(CURL_DISABLE_POP3)
+  !defined(CURL_DISABLE_POP3) || \
+  (!defined(CURL_DISABLE_LDAP) && defined(USE_OPENLDAP))
 
 #include <curl/curl.h>
 #include "urldata.h"
diff --git a/lib/vauth/cleartext.c b/lib/vauth/cleartext.c
index 1f6eae9997..c651fc5145 100644
--- a/lib/vauth/cleartext.c
+++ b/lib/vauth/cleartext.c
@@ -28,7 +28,8 @@
 #include "curl_setup.h"
 
 #if !defined(CURL_DISABLE_IMAP) || !defined(CURL_DISABLE_SMTP) ||       \
-  !defined(CURL_DISABLE_POP3)
+  !defined(CURL_DISABLE_POP3) || \
+  (!defined(CURL_DISABLE_LDAP) && defined(USE_OPENLDAP))
 
 #include <curl/curl.h>
 #include "urldata.h"
diff --git a/lib/vauth/oauth2.c b/lib/vauth/oauth2.c
index 5f0f0e6976..a4adbdcf15 100644
--- a/lib/vauth/oauth2.c
+++ b/lib/vauth/oauth2.c
@@ -27,7 +27,8 @@
 #include "curl_setup.h"
 
 #if !defined(CURL_DISABLE_IMAP) || !defined(CURL_DISABLE_SMTP) || \
-  !defined(CURL_DISABLE_POP3)
+  !defined(CURL_DISABLE_POP3) || \
+  (!defined(CURL_DISABLE_LDAP) && defined(USE_OPENLDAP))
 
 #include <curl/curl.h>
 #include "urldata.h"