diff --git a/reader.cpp b/reader.cpp
index 5882e727f..ae8c9b224 100644
--- a/reader.cpp
+++ b/reader.cpp
@@ -727,7 +727,9 @@ static void exec_prompt()
         {
             wcstring_list_t prompt_list;
             // status is ignored
-            __mark_as_unused int status = exec_subshell(data->left_prompt, prompt_list);
+            if (exec_subshell(data->left_prompt, prompt_list))
+            {
+            }
             for (size_t i = 0; i < prompt_list.size(); i++)
             {
                 if (i > 0) data->left_prompt_buff += L'\n';
@@ -739,7 +741,9 @@ static void exec_prompt()
         {
             wcstring_list_t prompt_list;
             // status is ignored
-            __mark_as_unused int status = exec_subshell(data->right_prompt, prompt_list);
+            if (exec_subshell(data->right_prompt, prompt_list))
+            {
+            }
             for (size_t i = 0; i < prompt_list.size(); i++)
             {
                 // Right prompt does not support multiple lines, so just concatenate all of them