diff --git a/include/linux/random.h b/include/linux/random.h
index 57fbbff..b05856e 100644
--- a/include/linux/random.h
+++ b/include/linux/random.h
@@ -26,7 +26,7 @@
 unsigned long randomize_range(unsigned long start, unsigned long end, unsigned long len);
 
 u32 prandom_u32(void);
-void prandom_bytes(void *buf, int nbytes);
+void prandom_bytes(void *buf, size_t nbytes);
 void prandom_seed(u32 seed);
 void prandom_reseed_late(void);
 
@@ -35,7 +35,7 @@
 };
 
 u32 prandom_u32_state(struct rnd_state *state);
-void prandom_bytes_state(struct rnd_state *state, void *buf, int nbytes);
+void prandom_bytes_state(struct rnd_state *state, void *buf, size_t nbytes);
 
 /**
  * prandom_u32_max - returns a pseudo-random number in interval [0, ep_ro)