diff --git a/sched/sched/sched_sysinfo.c b/sched/sched/sched_sysinfo.c
index b8cb500271..4edefd8a7a 100644
--- a/sched/sched/sched_sysinfo.c
+++ b/sched/sched/sched_sysinfo.c
@@ -54,7 +54,9 @@ int sysinfo(FAR struct sysinfo *info)
 #ifdef CONFIG_MM_PGALLOC
   struct pginfo_s pginfo;
 #endif
+#if defined(MM_KERNEL_USRHEAP_INIT) || defined(CONFIG_MM_KERNEL_HEAP)
   struct mallinfo minfo;
+#endif
 
   if (info == NULL)
     {