diff --git a/src/sbbs3/atcodes.cpp b/src/sbbs3/atcodes.cpp
index 7cdbbe6e413b3efb41305a94396ed1750528819d..b9fe0d3f7ff912b636e48391f1f1913cb0e709ba 100644
--- a/src/sbbs3/atcodes.cpp
+++ b/src/sbbs3/atcodes.cpp
@@ -822,7 +822,7 @@ const char* sbbs_t::atcode(char* sp, char* str, size_t maxlen, long* pmode, bool
 		return(client_name);
 
 	if(!strcmp(sp,"BDATE"))
-		return getbirthdstr(&cfg, useron.birth, str, sizeof(str));
+		return getbirthdstr(&cfg, useron.birth, str, maxlen);
 
 	if(!strcmp(sp,"AGE")) {
 		safe_snprintf(str,maxlen,"%u",getage(&cfg,useron.birth));