diff --git a/htdocs/product/class/api_products.class.php b/htdocs/product/class/api_products.class.php
index fd564b17278..1d71246cab7 100644
--- a/htdocs/product/class/api_products.class.php
+++ b/htdocs/product/class/api_products.class.php
@@ -1133,7 +1133,14 @@ class Products extends DolibarrApi
         }
 
         $prodcomb = new ProductCombination($this->db);
-        return $prodcomb->fetchAllByFkProductParent((int) $id);
+        $combinations = $prodcomb->fetchAllByFkProductParent((int) $id);
+        
+        foreach ($combinations as $key => $combination) {
+            $prodc2vp = new ProductCombination2ValuePair($this->db);
+            $combinations[$key]->attributes = $prodc2vp->fetchByFkCombination((int) $combination->id);
+        }
+        
+        return $combinations;
     }
 
     /**
@@ -1159,7 +1166,14 @@ class Products extends DolibarrApi
         }
 
         $prodcomb = new ProductCombination($this->db);
-        return $prodcomb->fetchAllByFkProductParent((int) $this->product->id);
+        $combinations = $prodcomb->fetchAllByFkProductParent((int) $this->product->id);
+        
+        foreach ($combinations as $key => $combination) {
+            $prodc2vp = new ProductCombination2ValuePair($this->db);
+            $combinations[$key]->attributes = $prodc2vp->fetchByFkCombination((int) $combination->id);
+        }
+        
+        return $combinations;
     }
 
     /**