diff --git a/core/custom_field_api.php b/core/custom_field_api.php
index 7ff49fbc0f..423da867dc 100644
--- a/core/custom_field_api.php
+++ b/core/custom_field_api.php
@@ -645,6 +645,7 @@ function custom_field_get_id_from_name( $p_field_name ) {
 	$t_result = db_query_bound( $query, array( $p_field_name ) );
 
 	if( db_num_rows( $t_result ) == 0 ) {
+		$g_cache_name_to_id_map[$p_field_name] = false;
 		return false;
 	}