diff --git a/winpr/libwinpr/sspi/Kerberos/kerberos.c b/winpr/libwinpr/sspi/Kerberos/kerberos.c
index faa563f99..4e6dd566b 100644
--- a/winpr/libwinpr/sspi/Kerberos/kerberos.c
+++ b/winpr/libwinpr/sspi/Kerberos/kerberos.c
@@ -902,7 +902,8 @@ static SECURITY_STATUS SEC_ENTRY kerberos_InitializeSecurityContextA(
 
 		isNewContext = TRUE;
 
-		context->targetHost = _strdup(host);
+		if (host)
+			context->targetHost = _strdup(host);
 		if (!context->targetHost)
 		{
 			status = SEC_E_INSUFFICIENT_MEMORY;