diff --git a/sys/geom/geom.h b/sys/geom/geom.h
index 3bab33d11413..df7ecb56ae13 100644
--- a/sys/geom/geom.h
+++ b/sys/geom/geom.h
@@ -178,12 +178,6 @@ void g_trace(int level, char *, ...);
 #	define G_T_BIO		2
 #	define G_T_ACCESS	4
 
-/* geom_enc.c */
-uint32_t g_dec_be2(u_char *p);
-uint32_t g_dec_be4(u_char *p);
-uint32_t g_dec_le2(u_char *p);
-uint32_t g_dec_le4(u_char *p);
-void g_enc_le4(u_char *p, uint32_t u);
 
 /* geom_event.c */
 void g_orphan_provider(struct g_provider *pp, int error);
@@ -298,4 +292,13 @@ extern struct sx topology_lock;
 
 #define GEOMGETCONF _IOWR('G',  0, struct sbuf)
 
+/* geom_enc.c */
+uint32_t g_dec_be2(u_char *p);
+uint32_t g_dec_be4(u_char *p);
+uint32_t g_dec_le2(u_char *p);
+uint32_t g_dec_le4(u_char *p);
+uint64_t g_dec_le8(u_char *p);
+void g_enc_le4(u_char *p, uint32_t u);
+void g_enc_le8(u_char *p, uint64_t u);
+
 #endif /* _GEOM_GEOM_H_ */
diff --git a/sys/geom/geom_enc.c b/sys/geom/geom_enc.c
index 657ac8cdbb5d..ebb1bd10ce76 100644
--- a/sys/geom/geom_enc.c
+++ b/sys/geom/geom_enc.c
@@ -101,3 +101,19 @@ g_enc_le4(u_char *p, uint32_t u)
 	p[3] = (u >> 24) & 0xff;
 }
 
+uint64_t
+g_dec_le8(u_char *p)
+{
+
+	return(g_dec_le4(p) | ((uint64_t)(g_dec_le4(p + 4)) << 32));
+}
+
+
+void
+g_enc_le8(u_char *p, uint64_t u)
+{
+
+	g_enc_le4(p, u);
+	g_enc_le4(p + 4, u >> 32);
+}
+