diff --git a/src/openvpn/ssl_ncp.c b/src/openvpn/ssl_ncp.c
index fdac6925..649665a 100644
--- a/src/openvpn/ssl_ncp.c
+++ b/src/openvpn/ssl_ncp.c
@@ -307,7 +307,7 @@
 }
 
 bool
-check_pull_client_ncp(struct context *c, const unsigned int found)
+check_pull_client_ncp(struct context *c, const uint64_t found)
 {
     if (found & OPT_P_NCP)
     {
diff --git a/src/openvpn/ssl_ncp.h b/src/openvpn/ssl_ncp.h
index 837f662..dc3a750 100644
--- a/src/openvpn/ssl_ncp.h
+++ b/src/openvpn/ssl_ncp.h
@@ -49,7 +49,7 @@
  *
  * @return  Wether the client NCP process suceeded or failed
  */
-bool check_pull_client_ncp(struct context *c, unsigned int found);
+bool check_pull_client_ncp(struct context *c, uint64_t found);
 
 /**
  * Iterates through the ciphers in server_list and return the first