diff --git a/htdocs/projet/class/project.class.php b/htdocs/projet/class/project.class.php
index f58886c9a3b..c6e9799afa7 100644
--- a/htdocs/projet/class/project.class.php
+++ b/htdocs/projet/class/project.class.php
@@ -241,7 +241,7 @@ class Project extends CommonObject
 
 		if (empty($conf->global->MAIN_SHOW_TECHNICAL_ID)) $this->fields['rowid']['visible'] = 0;
 
-		if (!empty($conf->global->PROJECT_USE_OPPORTUNITIES)) {
+		if (empty($conf->global->PROJECT_USE_OPPORTUNITIES)) {
 			$this->fields['fk_opp_status']['enabled'] = 0;
 			$this->fields['opp_percent']['enabled'] = 0;
 			$this->fields['opp_amount']['enabled'] = 0;