diff --git a/src/main/java/eu/siacs/conversations/ui/StartConversationActivity.java b/src/main/java/eu/siacs/conversations/ui/StartConversationActivity.java
index 765e77bcb5254a4033ef2a761f5e8d870ce7a311..b246130792a427df2cc14632c81e739693fc6046 100644
--- a/src/main/java/eu/siacs/conversations/ui/StartConversationActivity.java
+++ b/src/main/java/eu/siacs/conversations/ui/StartConversationActivity.java
@@ -1193,6 +1193,10 @@ public class StartConversationActivity extends XmppActivity implements OnRosterU
         public String account;
 
         boolean invite() {
+            if (!isJidValid()) {
+                Toast.makeText(StartConversationActivity.this,R.string.invalid_jid,Toast.LENGTH_SHORT).show();
+                return false;
+            }
             if (getJid() != null) {
                 return handleJid(this);
             }
diff --git a/src/main/java/eu/siacs/conversations/utils/XmppUri.java b/src/main/java/eu/siacs/conversations/utils/XmppUri.java
index 9e8f6111c17469fb4f69482a919b155e7d56d7a7..bfd4b7c65b7c219e96b72b04a6dfb8a0ea098e09 100644
--- a/src/main/java/eu/siacs/conversations/utils/XmppUri.java
+++ b/src/main/java/eu/siacs/conversations/utils/XmppUri.java
@@ -151,6 +151,15 @@ public class XmppUri {
 		}
 	}
 
+	public boolean isJidValid() {
+		try {
+			Jid.fromString(jid);
+			return true;
+		} catch (InvalidJidException e) {
+			return false;
+		}
+	}
+
 	public String getBody() {
 		return body;
 	}