diff --git a/htdocs/includes/odtphp/odf.php b/htdocs/includes/odtphp/odf.php
index 88fa70c5646..bc15530a777 100644
--- a/htdocs/includes/odtphp/odf.php
+++ b/htdocs/includes/odtphp/odf.php
@@ -820,11 +820,13 @@ IMG;
 		// Export to PDF using LibreOffice
 		if ($conf->global->MAIN_ODT_AS_PDF == 'libreoffice')
 		{
+			dol_mkdir($conf->user->dir_temp);	// We must be sure the directory exists and is writable
+
 			// Install prerequisites: apt install soffice libreoffice-common libreoffice-writer
 			// using windows libreoffice that must be in path
 			// using linux/mac libreoffice that must be in path
 			// Note PHP Config "fastcgi.impersonate=0" must set to 0 - Default is 1
-			$command ='soffice --headless -env:UserInstallation=file:"//'.$conf->user->dir_temp.'" --convert-to pdf --outdir '. escapeshellarg(dirname($name)). " ".escapeshellarg($name);
+			$command ='soffice --headless -env:UserInstallation=file:\''.$conf->user->dir_temp.'\' --convert-to pdf --outdir '. escapeshellarg(dirname($name)). " ".escapeshellarg($name);
 		}
 		elseif (preg_match('/unoconv/', $conf->global->MAIN_ODT_AS_PDF))
 		{