diff --git a/mm/compaction.c b/mm/compaction.c
index 212f41c6278b..b6ab77160068 100644
--- a/mm/compaction.c
+++ b/mm/compaction.c
@@ -1235,7 +1235,7 @@ int sysctl_extfrag_handler(struct ctl_table *table, int write,
 }
 
 #if defined(CONFIG_SYSFS) && defined(CONFIG_NUMA)
-ssize_t sysfs_compact_node(struct device *dev,
+static ssize_t sysfs_compact_node(struct device *dev,
 			struct device_attribute *attr,
 			const char *buf, size_t count)
 {