diff --git a/lib/domain/libimagcontact/Cargo.toml b/lib/domain/libimagcontact/Cargo.toml
index ef3d35dd..90d4a758 100644
--- a/lib/domain/libimagcontact/Cargo.toml
+++ b/lib/domain/libimagcontact/Cargo.toml
@@ -23,4 +23,5 @@ vobject     = "0.4"
 libimagstore     = { version = "0.6.0", path = "../../../lib/core/libimagstore" }
 libimagerror     = { version = "0.6.0", path = "../../../lib/core/libimagerror" }
 libimagentryref  = { version = "0.6.0", path = "../../../lib/entry/libimagentryref/" }
+libimagentryutil  = { version = "0.6.0", path = "../../../lib/entry/libimagentryutil/" }
 
diff --git a/lib/domain/libimagcontact/src/contact.rs b/lib/domain/libimagcontact/src/contact.rs
index 14a80e3b..6b112125 100644
--- a/lib/domain/libimagcontact/src/contact.rs
+++ b/lib/domain/libimagcontact/src/contact.rs
@@ -20,14 +20,12 @@
 use std::ops::Deref;
 
 use vobject::Component;
-use toml::Value;
-use toml_query::read::TomlValueReadExt;
 
 use libimagstore::store::Entry;
 use libimagentryref::reference::Ref;
+use libimagentryutil::isa::Is;
+use libimagentryutil::isa::IsKindHeaderPathProvider;
 
-use error::ContactError as CE;
-use error::ContactErrorKind as CEK;
 use error::Result;
 use util;
 
@@ -46,15 +44,12 @@ pub trait Contact : Ref {
 
 }
 
+provide_kindflag_path!(pub IsContact, "contact.is_contact");
+
 impl Contact for Entry {
 
     fn is_contact(&self) -> Result<bool> {
-        let location = "contact.marker";
-        match self.get_header().read(location)? {
-            Some(&Value::Boolean(b)) => Ok(b),
-            Some(_) => Err(CE::from_kind(CEK::HeaderTypeError("boolean", location))),
-            None    => Ok(false)
-        }
+        self.is::<IsContact>().map_err(From::from)
     }
 
     fn get_contact_data(&self) -> Result<ContactData> {
diff --git a/lib/domain/libimagcontact/src/error.rs b/lib/domain/libimagcontact/src/error.rs
index c3c81472..93f5d15e 100644
--- a/lib/domain/libimagcontact/src/error.rs
+++ b/lib/domain/libimagcontact/src/error.rs
@@ -28,6 +28,7 @@ error_chain! {
         StoreError(::libimagstore::error::StoreError, ::libimagstore::error::StoreErrorKind);
         RefError(::libimagentryref::error::RefError, ::libimagentryref::error::RefErrorKind);
         VObjectError(::vobject::error::VObjectError, ::vobject::error::VObjectErrorKind);
+        EntryUtilError(::libimagentryutil::error::EntryUtilError, ::libimagentryutil::error::EntryUtilErrorKind);
     }
 
     foreign_links {
diff --git a/lib/domain/libimagcontact/src/lib.rs b/lib/domain/libimagcontact/src/lib.rs
index efdb8a60..134a3206 100644
--- a/lib/domain/libimagcontact/src/lib.rs
+++ b/lib/domain/libimagcontact/src/lib.rs
@@ -42,6 +42,7 @@ extern crate toml_query;
 #[macro_use] extern crate libimagstore;
 extern crate libimagerror;
 extern crate libimagentryref;
+#[macro_use] extern crate libimagentryutil;
 
 module_entry_path_mod!("contact");
 
diff --git a/lib/domain/libimagcontact/src/store.rs b/lib/domain/libimagcontact/src/store.rs
index 770c08ff..505fa57d 100644
--- a/lib/domain/libimagcontact/src/store.rs
+++ b/lib/domain/libimagcontact/src/store.rs
@@ -20,15 +20,15 @@
 use std::path::PathBuf;
 
 use vobject::parse_component;
-use toml::Value;
-use toml_query::insert::TomlValueInsertExt;
 
 use libimagstore::store::Store;
 use libimagstore::store::FileLockEntry;
 use libimagstore::storeid::StoreIdIterator;
 use libimagentryref::refstore::RefStore;
 use libimagentryref::flags::RefFlags;
+use libimagentryutil::isa::Is;
 
+use contact::IsContact;
 use error::Result;
 use util;
 
@@ -71,8 +71,7 @@ impl<'a> ContactStore<'a> for Store {
         RefStore::create(self, p.clone(), flags)
             .map_err(From::from)
             .and_then(|mut entry| {
-                entry.get_header_mut()
-                    .insert("contact.marker", Value::Boolean(true))
+                entry.set_isflag::<IsContact>()
                     .map_err(From::from)
                     .map(|_| entry)
             })