diff --git a/source/net/filebot/format/ExpressionFormatFunctions.java b/source/net/filebot/format/ExpressionFormatFunctions.java
index c7aaf90d..c83d8d35 100644
--- a/source/net/filebot/format/ExpressionFormatFunctions.java
+++ b/source/net/filebot/format/ExpressionFormatFunctions.java
@@ -31,6 +31,9 @@ public class ExpressionFormatFunctions {
 				return null;
 			}
 		}
+		if (object instanceof CharSequence && object.toString().isEmpty()) {
+			return null;
+		}
 		return object;
 	}