diff --git a/TestStack.BDDfy/Scanners/StepScanners/Fluent/ExpressionExtensions.cs b/TestStack.BDDfy/Scanners/StepScanners/Fluent/ExpressionExtensions.cs
index 52a4b63..6803dc4 100644
--- a/TestStack.BDDfy/Scanners/StepScanners/Fluent/ExpressionExtensions.cs
+++ b/TestStack.BDDfy/Scanners/StepScanners/Fluent/ExpressionExtensions.cs
@@ -172,6 +172,7 @@ private static IEnumerable<object> ExtractConstants(ConstantExpression constantE
             else
             {
                 if (constantExpression.Type == typeof(string) ||
+					constantExpression.Type == typeof(decimal) ||
                     constantExpression.Type.IsPrimitive ||
                     constantExpression.Type.IsEnum ||
                     constantExpression.Value == null)