diff --git a/damus-c/damus.c b/damus-c/damus.c
index 41780fd9..6a782adb 100644
--- a/damus-c/damus.c
+++ b/damus-c/damus.c
@@ -167,11 +167,15 @@ static int parse_mention_bech32(struct cursor *cur, struct block *block) {
     if (!parse_str(cur, "nostr:"))
         return 0;
     
+    block->block.str.start = (const char *)cur->p;
+    
     if (!parse_nostr_bech32(cur, &block->block.mention_bech32.bech32)) {
         cur->p = start;
         return 0;
     }
     
+    block->block.str.end = (const char *)cur->p;
+    
     block->type = BLOCK_MENTION_BECH32;
 
     return 1;