diff --git a/src/net/i2p/itoopie/gui/CertificateGUI.java b/src/net/i2p/itoopie/gui/CertificateGUI.java
index eec66ccc0..caa5beca5 100644
--- a/src/net/i2p/itoopie/gui/CertificateGUI.java
+++ b/src/net/i2p/itoopie/gui/CertificateGUI.java
@@ -74,6 +74,7 @@ public class CertificateGUI {
 
 	public static boolean overwriteCert(String hostname, X509Certificate cert){
 		if (!isVerifying){
+			isVerifying = true;
 			JFrame frame = new JFrame();
 			
 			String title = Transl._("Warning, new remote host detected");