diff --git a/src/main/java/de/mrbesen/telegram/MessageBuilder.java b/src/main/java/de/mrbesen/telegram/MessageBuilder.java
index d56a0e0..9c0dc18 100644
--- a/src/main/java/de/mrbesen/telegram/MessageBuilder.java
+++ b/src/main/java/de/mrbesen/telegram/MessageBuilder.java
@@ -139,8 +139,8 @@ public class MessageBuilder {
 		String text = "";
 		if(attachmenttype != Attachment.none) {
 			if(caption != null)
-				attachment += "&caption=" + caption;
-			attachment = "&" + attachmenttype.name().toLowerCase() + "=" + this.attachment;
+				attachment = "&caption=" + caption;
+			attachment += "&" + attachmenttype.name().toLowerCase() + "=" + this.attachment;
 			cmd = "send" + attachmenttype.name();
 		} else {
 			cmd = "sendMessage";