diff --git a/sch2fig/sch-parse.c b/sch2fig/sch-parse.c
index 5b2fefa..9fde59f 100644
--- a/sch2fig/sch-parse.c
+++ b/sch2fig/sch-parse.c
@@ -134,6 +134,7 @@ static bool parse_field(struct sch_ctx *ctx, const char *line)
 			sprintf(s + len, "%c%c",
 			    'A' + (comp->unit - 1) / 26 - 1,
 			    'A' + (comp->unit - 1) % 26);
+		txt->s = s;
 	}
 
 	field->next = comp->fields;