diff --git a/htdocs/core/modules/commande/doc/pdf_einstein.modules.php b/htdocs/core/modules/commande/doc/pdf_einstein.modules.php
index ebae616c45b..3210ce78a6e 100644
--- a/htdocs/core/modules/commande/doc/pdf_einstein.modules.php
+++ b/htdocs/core/modules/commande/doc/pdf_einstein.modules.php
@@ -278,6 +278,9 @@ class pdf_einstein extends ModelePDFCommandes
 				global $action;
 				$reshook = $hookmanager->executeHooks('beforePDFCreation', $parameters, $object, $action); // Note that $action and $object may have been modified by some hooks
 
+				// Set nblines with the new command lines content after hook
+				$nblines = count($object->lines);
+				
 				// Create pdf instance
 				$pdf = pdf_getInstance($this->format);
 				$default_font_size = pdf_getPDFFontSize($outputlangs); // Must be after pdf_getInstance
diff --git a/htdocs/core/modules/commande/doc/pdf_eratosthene.modules.php b/htdocs/core/modules/commande/doc/pdf_eratosthene.modules.php
index 17837529354..a6a7648e174 100644
--- a/htdocs/core/modules/commande/doc/pdf_eratosthene.modules.php
+++ b/htdocs/core/modules/commande/doc/pdf_eratosthene.modules.php
@@ -323,6 +323,9 @@ class pdf_eratosthene extends ModelePDFCommandes
 				global $action;
 				$reshook = $hookmanager->executeHooks('beforePDFCreation', $parameters, $object, $action); // Note that $action and $object may have been modified by some hooks
 
+				// Set nblines with the new command lines content after hook
+				$nblines = count($object->lines);
+				
 				// Create pdf instance
 				$pdf = pdf_getInstance($this->format);
 				$default_font_size = pdf_getPDFFontSize($outputlangs); // Must be after pdf_getInstance