diff --git a/funcs/func_cdr.c b/funcs/func_cdr.c
index 82ff488b04..219e004298 100644
--- a/funcs/func_cdr.c
+++ b/funcs/func_cdr.c
@@ -377,7 +377,7 @@ static void cdr_write_callback(void *data, struct stasis_subscription *sub, stru
 			payload->cmd, payload->cmd);
 		return;
 	}
-	if (ast_strlen_zero(payload->value)) {
+	if (!payload->value) {
 		ast_log(AST_LOG_WARNING, "%s requires a value (%s(variable)=value)\n)",
 			payload->cmd, payload->cmd);
 		return;