diff --git a/include/ldap_log.h b/include/ldap_log.h
index a1e1f84dd0..36971e4828 100644
--- a/include/ldap_log.h
+++ b/include/ldap_log.h
@@ -123,7 +123,7 @@ LDAP_BEGIN_DECL
 #define LDAP_DEBUG_SYNC		0x4000
 
 #define LDAP_DEBUG_NONE		0x8000
-#define LDAP_DEBUG_ANY		((unsigned long)-1)
+#define LDAP_DEBUG_ANY		(-1)
 
 /* debugging stuff */
 #ifdef LDAP_DEBUG