diff --git a/application/controllers/Api.php b/application/controllers/Api.php
index 68ad31e21..b084ddf47 100644
--- a/application/controllers/Api.php
+++ b/application/controllers/Api.php
@@ -598,7 +598,7 @@ class API extends CI_Controller {
 					// Get associated station locations for mysql queries
 					$logbooks_locations_array = $this->logbooks_model->list_logbook_relationships($logbook_id);
 
-					if (!$logbooks_locations_array) {
+					if ($logbooks_locations_array[0] == -1) {
 						// Logbook not found
 						http_response_code(404);
 						echo json_encode(['status' => 'failed', 'reason' => "Empty Logbook"]);
@@ -684,7 +684,7 @@ class API extends CI_Controller {
 					// Get associated station locations for mysql queries
 					$logbooks_locations_array = $this->logbooks_model->list_logbook_relationships($logbook_id);
 
-					if (!$logbooks_locations_array) {
+					if ($logbooks_locations_array[0] == -1) {
 						// Logbook not found
 						http_response_code(404);
 						echo json_encode(['status' => 'failed', 'reason' => "Empty Logbook"]);