diff --git a/config.def.h b/config.def.h
index 0a020ee..5956647 100644
--- a/config.def.h
+++ b/config.def.h
@@ -20,7 +20,7 @@ static struct {
 	regex_t re;
 } vhost[] = {
 	/* canonical host      host regex                     directory      */
-	{ "example.org",       "^(www\\.)?example.org$",      "/example.org" },
+	{ "example.org",       "^(www\\.)?example\\.org$",    "/example.org" },
 };
 
 /* mime-types */
diff --git a/quark.c b/quark.c
index fd5f36b..f2014c2 100644
--- a/quark.c
+++ b/quark.c
@@ -1010,7 +1010,7 @@ main(int argc, char *argv[])
 	if (vhosts) {
 		for (i = 0; i < LEN(vhost); i++) {
 			if (regcomp(&vhost[i].re, vhost[i].regex,
-			            REG_ICASE | REG_NOSUB)) {
+			            REG_EXTENDED | REG_ICASE | REG_NOSUB)) {
 				die("%s: regcomp '%s': invalid regex\n", argv0,
 				    vhost[i].regex);
 			}