diff --git a/servers/slapd/schema_init.c b/servers/slapd/schema_init.c
index 36e80c0490..1e87457869 100644
--- a/servers/slapd/schema_init.c
+++ b/servers/slapd/schema_init.c
@@ -3884,7 +3884,7 @@ issuerAndThisUpdateCheck(
 
 	if ( in->bv_len < STRLENOF( "{issuer \"\",thisUpdate \"YYMMDDhhmmssZ\"}" ) ) return LDAP_INVALID_SYNTAX;
 
-	if ( in->bv_val[0] != '{' && in->bv_val[in->bv_len-1] != '}' ) {
+	if ( in->bv_val[0] != '{' || in->bv_val[in->bv_len-1] != '}' ) {
 		return LDAP_INVALID_SYNTAX;
 	}