diff --git a/src/conf.c b/src/conf.c
index d40d3a3..0af3c6a 100644
--- a/src/conf.c
+++ b/src/conf.c
@@ -964,7 +964,7 @@ static HANDLE_FUNC (handle_upstream)
         ip = get_string_arg (line, &match[mi]);
         if (!ip)
                 return -1;
-        mi += 5;
+        mi += 3;
 
         port = (int) get_long_arg (line, &match[mi]);
         mi += 2;
diff --git a/src/conf_regex.h b/src/conf_regex.h
index 281e67b..c2d78f9 100644
--- a/src/conf_regex.h
+++ b/src/conf_regex.h
@@ -16,7 +16,7 @@
 #define ALNUM "([-A-Za-z0-9._]+)"
 #define USERNAME "([^:]*)"
 #define PASSWORD "([^@]*)"
-#define IP "((([0-9]{1,3})\\.){3}[0-9]{1,3})"
+#define IP "([0-9]+[.][0-9]+[.][0-9]+[.][0-9]+)"
 #define IPMASK "(" IP "(/" DIGIT "+)?)"
 #define IPV6 "(" \
         "(([0-9a-fA-F:]{2,39}))|" \