diff --git a/src/modules/module_30700.c b/src/modules/module_30700.c
index 281d818e3..953ed21da 100644
--- a/src/modules/module_30700.c
+++ b/src/modules/module_30700.c
@@ -175,9 +175,7 @@ int module_hash_encode (MAYBE_UNUSED const hashconfig_t *hashconfig, MAYBE_UNUSE
 
   u8 *out_buf = (u8 *) line_buf;
 
-  int out_len = strlen("sha256:");;
-
-  memcpy (out_buf, "sha256:", out_len);
+  int out_len = snprintf (line_buf, line_size, "%s:", SIGNATURE_ANOPE);
 
   u32_to_hex (tmp[0], out_buf + out_len); out_len += 8;
   u32_to_hex (tmp[1], out_buf + out_len); out_len += 8;