1 files changed, 2 insertions, 1 deletions

diff --git a/arch/um/drivers/slip_user.c b/arch/um/drivers/slip_user.c
index 9f41cece0916..78f0e515da8f 100644
--- a/arch/um/drivers/slip_user.c
+++ b/arch/um/drivers/slip_user.c
@@ -15,6 +15,7 @@
 #include "slip_common.h"
 #include "os.h"
 #include "um_malloc.h"
+#include "kern_constants.h"
 
 static int slip_user_init(void *data, void *dev)
 {
@@ -89,7 +90,7 @@ static int slip_tramp(char **argv, int fd)
                 goto out_close;
         pid = err;
 
-        output_len = page_size();
+        output_len = UM_KERN_PAGE_SIZE;
         output = um_kmalloc(output_len);
         if(output == NULL){
                 printk("slip_tramp : failed to allocate output buffer\n");