diff --git a/tools/gen/header_template b/tools/gen/header_template
index 45d959f1d..e606bf474 100644
--- a/tools/gen/header_template
+++ b/tools/gen/header_template
@@ -129,8 +129,7 @@ extern const struct tlv_record_type tlvs_${tlv.name}[];
     % endfor
 void towire_${subtype.name}(u8 **p, const ${subtype.type_name()} *${subtype.name});
 % if subtype.is_varsize():
-${subtype.type_name()} *
-fromwire_${subtype.name}(const tal_t *ctx, const u8 **cursor, size_t *plen);
+${subtype.type_name()} *fromwire_${subtype.name}(const tal_t *ctx, const u8 **cursor, size_t *plen);
 % else:
 void fromwire_${subtype.name}(const u8 **cursor, size_t *plen, ${subtype.type_name()} *${subtype.name});
 % endif