diff --git a/public/viewjs/consume.js b/public/viewjs/consume.js
index 34ab00a1..fdf114e1 100644
--- a/public/viewjs/consume.js
+++ b/public/viewjs/consume.js
@@ -383,7 +383,7 @@ Grocy.Components.ProductPicker.GetPicker().on('change', function(e)
 												$("#display_amount").select();
 											}
 
-											if (barcode.qu_id != null)
+											if (barcode.qu_id != null && !barcode.qu_id.isEmpty())
 											{
 												Grocy.Components.ProductAmountPicker.SetQuantityUnit(barcode.qu_id);
 											}
diff --git a/public/viewjs/inventory.js b/public/viewjs/inventory.js
index 59cd1cbf..a2509295 100644
--- a/public/viewjs/inventory.js
+++ b/public/viewjs/inventory.js
@@ -199,7 +199,7 @@ Grocy.Components.ProductPicker.GetPicker().on('change', function(e)
 										$("#display_amount").select();
 									}
 
-									if (barcode.qu_id != null)
+									if (barcode.qu_id != null && !barcode.qu_id.isEmpty())
 									{
 										Grocy.Components.ProductAmountPicker.SetQuantityUnit(barcode.qu_id);
 									}
diff --git a/public/viewjs/purchase.js b/public/viewjs/purchase.js
index ab78c9e9..0bcc7002 100644
--- a/public/viewjs/purchase.js
+++ b/public/viewjs/purchase.js
@@ -349,7 +349,7 @@ if (Grocy.Components.ProductPicker !== undefined)
 											$("#display_amount").select();
 										}
 
-										if (barcode.qu_id != null)
+										if (barcode.qu_id != null && !barcode.qu_id.isEmpty())
 										{
 											Grocy.Components.ProductAmountPicker.SetQuantityUnit(barcode.qu_id);
 										}
diff --git a/public/viewjs/transfer.js b/public/viewjs/transfer.js
index d0140a27..74126afc 100644
--- a/public/viewjs/transfer.js
+++ b/public/viewjs/transfer.js
@@ -223,7 +223,7 @@ Grocy.Components.ProductPicker.GetPicker().on('change', function(e)
 										$("#display_amount").select();
 									}
 
-									if (barcode.qu_id != null)
+									if (barcode.qu_id != null && !barcode.qu_id.isEmpty())
 									{
 										Grocy.Components.ProductAmountPicker.SetQuantityUnit(barcode.qu_id);
 									}