diff --git a/contrib/ldapc++/src/LDAPEntryList.h b/contrib/ldapc++/src/LDAPEntryList.h
index 1eae1058d2..eadc537475 100644
--- a/contrib/ldapc++/src/LDAPEntryList.h
+++ b/contrib/ldapc++/src/LDAPEntryList.h
@@ -7,6 +7,7 @@
 #ifndef LDAP_ENTRY_LIST_H
 #define LDAP_ENTRY_LIST_H
 
+#include <cstdio>
 #include <list>
 
 class LDAPEntry;
diff --git a/contrib/ldapc++/src/LDAPReferenceList.h b/contrib/ldapc++/src/LDAPReferenceList.h
index 34af7473cd..17bb164b13 100644
--- a/contrib/ldapc++/src/LDAPReferenceList.h
+++ b/contrib/ldapc++/src/LDAPReferenceList.h
@@ -7,6 +7,7 @@
 #ifndef LDAP_REFERENCE_LIST_H
 #define LDAP_REFERENCE_LIST_H
 
+#include <cstdio>
 #include <list>
 
 class LDAPSearchReference;