diff --git a/pkg/haproxy/instance_test.go b/pkg/haproxy/instance_test.go
index 24d246573..e5beabd09 100644
--- a/pkg/haproxy/instance_test.go
+++ b/pkg/haproxy/instance_test.go
@@ -539,7 +539,7 @@ backend d1_app_8080
 frontend _front_http
     mode http
     ` + test.expectedHTTP + `
-    http-request set-var(req.base) base,regsub(:[0-9]+/,/)
+    http-request set-var(req.base) base,lower,regsub(:[0-9]+/,/)
     http-request redirect scheme https if { var(req.base),map_beg(/etc/haproxy/maps/_global_https_redir.map,_nomatch) yes }
     <<http-headers>>
     http-request set-var(req.backend) var(req.base),map_beg(/etc/haproxy/maps/_global_http_front.map,_nomatch)
@@ -1476,7 +1476,7 @@ backend d1_app_8080
 frontend _front_http
     mode http
     bind :80
-    http-request set-var(req.base) base,regsub(:[0-9]+/,/)
+    http-request set-var(req.base) base,lower,regsub(:[0-9]+/,/)
     http-request redirect scheme https if { var(req.base),map_beg(/etc/haproxy/maps/_global_https_redir.map,_nomatch) yes }
     <<http-headers>>
     http-request set-var(req.backend) var(req.base),map_beg(/etc/haproxy/maps/_global_http_front.map,_nomatch)
@@ -1614,7 +1614,7 @@ backend d2_app_8080
 frontend _front_http
     mode http
     bind :80
-    http-request set-var(req.base) base,regsub(:[0-9]+/,/)
+    http-request set-var(req.base) base,lower,regsub(:[0-9]+/,/)
     http-request redirect scheme https if { var(req.base),map_beg(/etc/haproxy/maps/_global_https_redir.map,_nomatch) yes }
     http-request set-var(req.host) hdr(host),lower,regsub(:[0-9]+/,/)
     http-request set-var(req.rootredir) var(req.host),map(/etc/haproxy/maps/_global_http_root_redir.map,_nomatch)
@@ -2239,7 +2239,7 @@ listen _front__tls
 frontend _front_http
     mode http
     bind :80
-    http-request set-var(req.base) base,regsub(:[0-9]+/,/)
+    http-request set-var(req.base) base,lower,regsub(:[0-9]+/,/)
     http-request set-var(req.redir) var(req.base),map_beg(/etc/haproxy/maps/_global_https_redir.map,_nomatch)
     http-request redirect scheme https if { var(req.redir) yes }
     http-request redirect scheme https if { var(req.redir) _nomatch } { var(req.base),map_reg(/etc/haproxy/maps/_global_https_redir_regex.map,_nomatch) yes }
@@ -2609,7 +2609,7 @@ backend _error496
 		"<<frontend-http>>": `frontend _front_http
     mode http
     bind :80
-    http-request set-var(req.base) base,regsub(:[0-9]+/,/)
+    http-request set-var(req.base) base,lower,regsub(:[0-9]+/,/)
     http-request redirect scheme https if { var(req.base),map_beg(/etc/haproxy/maps/_global_https_redir.map,_nomatch) yes }
     <<http-headers>>
     http-request set-var(req.backend) var(req.base),map_beg(/etc/haproxy/maps/_global_http_front.map,_nomatch)
diff --git a/rootfs/etc/haproxy/template/haproxy.tmpl b/rootfs/etc/haproxy/template/haproxy.tmpl
index 4fb778304..3f988fed9 100644
--- a/rootfs/etc/haproxy/template/haproxy.tmpl
+++ b/rootfs/etc/haproxy/template/haproxy.tmpl
@@ -638,7 +638,7 @@ frontend _front_http
 {{- end }}
 
 {{- /*------------------------------------*/}}
-    http-request set-var(req.base) base,regsub(:[0-9]+/,/)
+    http-request set-var(req.base) base,lower,regsub(:[0-9]+/,/)
 
 {{- /*------------------------------------*/}}
 {{- if $fgroup.HTTPSRedirMap.HasRegex }}