diff --git a/lib/ssh_scan/client.rb b/lib/ssh_scan/client.rb
index 697d7be3..ac83c227 100644
--- a/lib/ssh_scan/client.rb
+++ b/lib/ssh_scan/client.rb
@@ -98,6 +98,8 @@ def get_kex_result(kex_init_raw = @kex_init_raw)
         return nil
       end
 
+      kex_exchange_init = nil
+
       begin
         Timeout::timeout(@timeout) {
           @sock.write(kex_init_raw)