diff --git a/src/umbraco.editorControls/numberfield/numberField.cs b/src/umbraco.editorControls/numberfield/numberField.cs
index f5552e62ec..104cce102e 100644
--- a/src/umbraco.editorControls/numberfield/numberField.cs
+++ b/src/umbraco.editorControls/numberfield/numberField.cs
@@ -75,8 +75,8 @@ namespace umbraco.editorControls
             set
             {
                 int integer;
-                
-                if (int.TryParse(value, NumberStyles.AllowThousands, CultureInfo.InvariantCulture, out integer))
+
+                if (int.TryParse(value, NumberStyles.AllowThousands | NumberStyles.AllowLeadingSign, CultureInfo.InvariantCulture, out integer))
                 {
                     base.Text = integer.ToString();
                 }