diff --git a/repos/dde_linux/src/lib/lx_emul/shadow/drivers/char/random.c b/repos/dde_linux/src/lib/lx_emul/shadow/drivers/char/random.c
index a05e3e84cb..aa3e1a6513 100644
--- a/repos/dde_linux/src/lib/lx_emul/shadow/drivers/char/random.c
+++ b/repos/dde_linux/src/lib/lx_emul/shadow/drivers/char/random.c
@@ -16,6 +16,7 @@
 #include <lx_emul/random.h>
 
 #include <linux/random.h>
+#include <linux/version.h>
 
 
 void add_input_randomness(unsigned int type,unsigned int code,unsigned int value)
@@ -45,8 +46,11 @@ int __must_check get_random_bytes_arch(void *buf, int nbytes)
 	return nbytes;
 }
 
-
+#if LINUX_VERSION_CODE < KERNEL_VERSION(5,15,0)
+void get_random_bytes(void *buf, int nbytes)
+#else
 void get_random_bytes(void *buf, size_t nbytes)
+#endif
 {
 	nbytes = get_random_bytes_arch(buf, nbytes);
 }