diff --git a/ChangeLog b/ChangeLog
index 34448e95543..218d6aada55 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -23,6 +23,7 @@ For users:
 - Fix: Withdrawal total amount is double
 - Fix: [ bug #1593 ] Spanish Localtax IRPF not being calculated since 3.6.0 in supplier invoices when adding a line
 - Fix: Web service categorie WDSL declaration is correct
+- Fix: ErrorBadValueForParamNotAString was displayed in virtual product if no base price defined
 
 ***** ChangeLog for 3.6 compared to 3.5.* *****
 For users:
diff --git a/htdocs/product/composition/fiche.php b/htdocs/product/composition/fiche.php
index 26761a2d56b..bf89798e79f 100644
--- a/htdocs/product/composition/fiche.php
+++ b/htdocs/product/composition/fiche.php
@@ -34,6 +34,7 @@ require_once DOL_DOCUMENT_ROOT.'/categories/class/categorie.class.php';
 
 $langs->load("bills");
 $langs->load("products");
+$langs->load("main");
 
 $id=GETPOST('id','int');
 $ref=GETPOST('ref','alpha');
@@ -292,13 +293,17 @@ if ($id > 0 || ! empty($ref))
 		{
 		    // Price
 			print '<tr><td>'.$langs->trans("SellingPrice").'</td><td>';
+			
 			if ($object->price_base_type == 'TTC')
 			{
 				print price($object->price_ttc).' '.$langs->trans($object->price_base_type);
 			}
 			else
 			{
-				print price($object->price).' '.$langs->trans($object->price_base_type);
+				print price($object->price);
+				if (!empty($object->price_base_type)) {
+					print ' '.$langs->trans($object->price_base_type);
+				}
 			}
 			print '</td></tr>';
 
@@ -310,7 +315,10 @@ if ($id > 0 || ! empty($ref))
 			}
 			else
 			{
-				print price($object->price_min).' '.$langs->trans($object->price_base_type);
+				print price($object->price_min);
+				if (!empty($object->price_base_type)) {
+					print ' '.$langs->trans($object->price_base_type);
+				}
 			}
 			print '</td></tr>';
 		}