diff --git a/scheme/conditions.scm b/scheme/conditions.scm
index 065383f..8db2689 100644
--- a/scheme/conditions.scm
+++ b/scheme/conditions.scm
@@ -180,6 +180,20 @@
 (define-condition-type &ldap-referral-limit-exceeded &ldap-error
   ldap-referral-limit-exceeded?)
 
+;; ldap filter conditions 
+
+(define-condition-type &ldap-filter-error &ldap-error
+  ldap-filter-error?)
+
+(define-condition-type &ldap-filter-wrong-type &ldap-filter-error
+  ldap-filter-wrong-type?
+  (expected ldap-filter-wrong-type-expected)
+  (value ldap-filter-wrong-type-value))
+
+(define-condition-type &ldap-filter-internal-error &ldap-filter-error
+  ldap-filter-internal-error?
+  (what ldap-filter-internal-error-what))
+
 (define raise-ldap-condition
   (let ((alist
 	 `((,(ldap-return operations-error)		,&ldap-operations-error)
@@ -246,3 +260,15 @@
 	(raise 
 	 (condition (&ldap-bindings-internal-error 
 		     (code return-object)))))))))
+
+; conditions raised in ldap-filter
+
+(define-condition-type &ldap-filter-wrong-type &ldap-error
+  ldap-filter-wrong-type?
+  (expected ldap-filter-wrong-type-expected)
+  (value ldap-filter-wrong-type-value))
+
+(define-condition-type &ldap-filter-internal-error &ldap-error
+  ldap-filter-internal-error?
+  (what ldap-filter-internal-error-what))
+   
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