diff --git a/dtls.c b/dtls.c
index fca172d7..5577238a 100644
--- a/dtls.c
+++ b/dtls.c
@@ -28,19 +28,6 @@
 
 #include "openconnect-internal.h"
 
-static unsigned char nybble(unsigned char n)
-{
-	if      (n >= '0' && n <= '9') return n - '0';
-	else if (n >= 'A' && n <= 'F') return n - ('A' - 10);
-	else if (n >= 'a' && n <= 'f') return n - ('a' - 10);
-	return 0;
-}
-
-unsigned char unhex(const char *data)
-{
-	return (nybble(data[0]) << 4) | nybble(data[1]);
-}
-
 #ifdef HAVE_DTLS
 
 #if 0
diff --git a/openconnect-internal.h b/openconnect-internal.h
index b2c3783e..0eb06e84 100644
--- a/openconnect-internal.h
+++ b/openconnect-internal.h
@@ -645,6 +645,7 @@ char *openconnect_legacy_to_utf8(struct openconnect_info *vpninfo, const char *l
 #endif
 
 /* script.c */
+unsigned char unhex(const char *data);
 int script_setenv(struct openconnect_info *vpninfo, const char *opt, const char *val, int append);
 int script_setenv_int(struct openconnect_info *vpninfo, const char *opt, int value);
 void prepare_script_env(struct openconnect_info *vpninfo);
@@ -659,7 +660,6 @@ int os_write_tun(struct openconnect_info *vpninfo, struct pkt *pkt);
 intptr_t os_setup_tun(struct openconnect_info *vpninfo);
 
 /* dtls.c */
-unsigned char unhex(const char *data);
 int dtls_setup(struct openconnect_info *vpninfo, int dtls_attempt_period);
 int dtls_mainloop(struct openconnect_info *vpninfo, int *timeout);
 int dtls_try_handshake(struct openconnect_info *vpninfo);
diff --git a/script.c b/script.c
index 65156c6c..26996b20 100644
--- a/script.c
+++ b/script.c
@@ -166,6 +166,19 @@ static void setenv_cstp_opts(struct openconnect_info *vpninfo)
 	free(env_buf);
 }
 
+static unsigned char nybble(unsigned char n)
+{
+	if      (n >= '0' && n <= '9') return n - '0';
+	else if (n >= 'A' && n <= 'F') return n - ('A' - 10);
+	else if (n >= 'a' && n <= 'f') return n - ('a' - 10);
+	return 0;
+}
+
+unsigned char unhex(const char *data)
+{
+	return (nybble(data[0]) << 4) | nybble(data[1]);
+}
+
 static void set_banner(struct openconnect_info *vpninfo)
 {
 	char *banner, *legacy_banner, *q;