diff --git a/mm/internal.h b/mm/internal.h
index ebb68ad10d5c..f50a0376b87e 100644
--- a/mm/internal.h
+++ b/mm/internal.h
@@ -640,6 +640,11 @@ int user_proactive_reclaim(char *buf,
  */
 pmd_t *mm_find_pmd(struct mm_struct *mm, unsigned long address);
 
+/*
+ * in mm/khugepaged.c
+ */
+void set_recommended_min_free_kbytes(void);
+
 /*
  * in mm/page_alloc.c
  */
diff --git a/mm/khugepaged.c b/mm/khugepaged.c
index ab97423fe837..e1eb3c7e59c3 100644
--- a/mm/khugepaged.c
+++ b/mm/khugepaged.c
@@ -2660,7 +2660,7 @@ static int khugepaged(void *none)
 	return 0;
 }
 
-static void set_recommended_min_free_kbytes(void)
+void set_recommended_min_free_kbytes(void)
 {
 	struct zone *zone;
 	int nr_zones = 0;