diff --git a/mongoose.c b/mongoose.c
index 2332f21f89cf869daf820cd873e59c0c75fc9221..9fbb0ec90906d54a219f3c1a47c733f6abe35eaa 100644
--- a/mongoose.c
+++ b/mongoose.c
@@ -2120,7 +2120,7 @@ bin2str(char *to, const unsigned char *p, size_t len)
  * Return stringified MD5 hash for list of vectors.
  * buf must point to 33-bytes long buffer
  */
-static void
+void
 mg_md5(char *buf, ...)
 {
 	unsigned char	hash[16];
diff --git a/mongoose.h b/mongoose.h
index c3c8834efa0d59f1f699a1f10748ccc422bb61d7..6c9218f7b81a89ca2768d8cb63321fe4e74be2e5 100644
--- a/mongoose.h
+++ b/mongoose.h
@@ -236,6 +236,17 @@ enum mg_error_t mg_get_cookie(const struct mg_connection *,
 const char *mg_version(void);
 
 
+/*
+ * MD5 hash given strings.
+ * Buffer 'buf' must be 33 bytes long. Varargs is a NULL terminated list of
+ * asciiz strings. When function returns, buf will contain human-readable
+ * MD5 hash. Example:
+ *   char buf[33];
+ *   mg_md5(buf, "aa", "bb", NULL);
+ */
+void mg_md5(char *buf, ...);
+
+
 /*
  * Print command line usage string.
  */