diff --git a/mangle.c b/mangle.c
index e391986..524c777 100644
--- a/mangle.c
+++ b/mangle.c
@@ -408,8 +408,12 @@ struct verdict analyze_tls_data(
 
 
 			unsigned int j = 0;
-			for (unsigned int i = 0; i < config.domains_strlen; i++) {
-				if (config.domains_str[i] == ',' || config.domains_str[i] == '\n') {
+			for (unsigned int i = 0; i <= config.domains_strlen; i++) {
+				if (	i == config.domains_strlen	||	
+					config.domains_str[i] == '\0'	||
+					config.domains_str[i] == ','	|| 
+					config.domains_str[i] == '\n'	) {
+
 					unsigned int domain_len = (i - j);
 					const char *sni_startp = sni_name + sni_len - domain_len;
 					const char *domain_startp = config.domains_str + j;