diff --git a/http.c b/http.c
index b414f51e..31368b23 100644
--- a/http.c
+++ b/http.c
@@ -40,19 +40,12 @@ static int proxy_read(struct openconnect_info *vpninfo, char *buf, size_t len);
 #define MAX_BUF_LEN 131072
 #define BUF_CHUNK_SIZE 4096
 
-struct oc_text_buf {
-	char *data;
-	int pos;
-	int buf_len;
-	int error;
-};
-
-static struct oc_text_buf *buf_alloc(void)
+struct oc_text_buf *buf_alloc(void)
 {
 	return calloc(1, sizeof(struct oc_text_buf));
 }
 
-static void buf_append(struct oc_text_buf *buf, const char *fmt, ...)
+void buf_append(struct oc_text_buf *buf, const char *fmt, ...)
 {
 	va_list ap;
 
@@ -99,12 +92,12 @@ static void buf_append(struct oc_text_buf *buf, const char *fmt, ...)
 	}
 }
 
-static int buf_error(struct oc_text_buf *buf)
+int buf_error(struct oc_text_buf *buf)
 {
 	return buf ? buf->error : -ENOMEM;
 }
 
-static int buf_free(struct oc_text_buf *buf)
+int buf_free(struct oc_text_buf *buf)
 {
 	int error = buf_error(buf);
 
diff --git a/openconnect-internal.h b/openconnect-internal.h
index ac3dcab4..f9e84d33 100644
--- a/openconnect-internal.h
+++ b/openconnect-internal.h
@@ -126,6 +126,13 @@ struct pin_cache {
 	char *pin;
 };
 
+struct oc_text_buf {
+	char *data;
+	int pos;
+	int buf_len;
+	int error;
+};
+
 #define RECONNECT_INTERVAL_MIN	10
 #define RECONNECT_INTERVAL_MAX	100
 
@@ -552,6 +559,10 @@ int xmlpost_initial_req(struct openconnect_info *vpninfo, char *request_body, in
 int prepare_stoken(struct openconnect_info *vpninfo);
 
 /* http.c */
+struct oc_text_buf *buf_alloc(void);
+void buf_append(struct oc_text_buf *buf, const char *fmt, ...);
+int buf_error(struct oc_text_buf *buf);
+int buf_free(struct oc_text_buf *buf);
 char *openconnect_create_useragent(const char *base);
 int process_proxy(struct openconnect_info *vpninfo, int ssl_sock);
 int internal_parse_url(char *url, char **res_proto, char **res_host,