diff --git a/Modules/LDAPObject.h b/Modules/LDAPObject.h
index 4223735..a0adc3f 100644
--- a/Modules/LDAPObject.h
+++ b/Modules/LDAPObject.h
@@ -7,8 +7,8 @@
 
 #include "lber.h"
 #include "ldap.h"
-#if LDAP_API_VERSION < 2000
-#error Current python-ldap requires OpenLDAP 2.x
+#if LDAP_API_VERSION < 2040
+#error Current python-ldap requires OpenLDAP 2.4.x
 #endif
 
 #if PYTHON_API_VERSION < 1007