diff --git a/CHANGELOG.md b/CHANGELOG.md
index 865fc054..89202c08 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,10 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 
 ## [UNRELEASED]
 
+### Fixed
+
+- Technician names missing on stacked bar chart labels
+
 ## [1.10.2] - 2026-09-01
 
 ### Fixed
diff --git a/Makefile b/Makefile
new file mode 100644
index 00000000..ef1bed5a
--- /dev/null
+++ b/Makefile
@@ -0,0 +1 @@
+include ../../PluginsMakefile.mk
diff --git a/inc/graph.class.php b/inc/graph.class.php
index c03b80d5..9e5c2169 100644
--- a/inc/graph.class.php
+++ b/inc/graph.class.php
@@ -1908,7 +1908,8 @@ public function initDatasMultiple($datas, $labels2, $unit = '', $stacked = false
 
         $out .= 'var labels = ' . json_encode($labels, JSON_HEX_TAG | JSON_HEX_APOS | JSON_HEX_QUOT | JSON_HEX_AMP) . ";\n";
 
-        $out .= 'var labels2 = ' . json_encode($labels2, JSON_HEX_TAG | JSON_HEX_APOS | JSON_HEX_QUOT | JSON_HEX_AMP) . ";\n";
+        // labels2 keys (e.g. technician login) are only used to align datas order ; JS consumes it positionally
+        $out .= 'var labels2 = ' . json_encode(array_values($labels2), JSON_HEX_TAG | JSON_HEX_APOS | JSON_HEX_QUOT | JSON_HEX_AMP) . ";\n";
         echo $out;
 
         if (!$stacked) {