diff --git a/src/netconf-client.cpp b/src/netconf-client.cpp
index 8f0e2ec..3ced537 100644
--- a/src/netconf-client.cpp
+++ b/src/netconf-client.cpp
@@ -276,9 +276,9 @@
     return res;
 }
 
-std::shared_ptr<libyang::Data_Node> Session::get(const std::string& filter)
+std::shared_ptr<libyang::Data_Node> Session::get(const std::optional<std::string>& filter)
 {
-    auto rpc = impl::guarded(nc_rpc_get(filter.c_str(), NC_WD_ALL, NC_PARAMTYPE_CONST));
+    auto rpc = impl::guarded(nc_rpc_get(filter ? filter->c_str() : nullptr, NC_WD_ALL, NC_PARAMTYPE_CONST));
     if (!rpc) {
         throw std::runtime_error("Cannot create get RPC");
     }
diff --git a/src/netconf-client.h b/src/netconf-client.h
index b9a1925..6d57e01 100644
--- a/src/netconf-client.h
+++ b/src/netconf-client.h
@@ -35,7 +35,7 @@
     std::vector<std::string_view> capabilities() const;
     std::shared_ptr<libyang::Data_Node> getConfig(const NC_DATASTORE datastore,
                                                   const std::optional<const std::string> filter = std::nullopt); // TODO: arguments...
-    std::shared_ptr<libyang::Data_Node> get(const std::string& filter);
+    std::shared_ptr<libyang::Data_Node> get(const std::optional<std::string>& filter = std::nullopt);
     std::string getSchema(const std::string_view identifier, const std::optional<std::string_view> version);
     void editConfig(const NC_DATASTORE datastore,
                     const NC_RPC_EDIT_DFLTOP defaultOperation,