diff --git a/sysbench/sb_rand.c b/sysbench/sb_rand.c
index bfc2350..5e6e634 100644
--- a/sysbench/sb_rand.c
+++ b/sysbench/sb_rand.c
@@ -170,10 +170,10 @@ void sb_rand_done(void)
 void sb_rand_thread_init(void)
 {
   /* We use libc PRNG to see xoroshiro128+ */
-  sb_rng_state[0] = ((((uint64_t) random()) % UINT32_MAX) << 32) |
-    (((uint64_t) random()) % UINT32_MAX);
-  sb_rng_state[1] = ((((uint64_t) random()) % UINT32_MAX) << 32) |
-    (((uint64_t) random()) % UINT32_MAX);
+  sb_rng_state[0] = (((uint64_t) random()) << 32) |
+    (((uint64_t) random()) & UINT32_MAX);
+  sb_rng_state[1] = (((uint64_t) random()) << 32) |
+    (((uint64_t) random()) & UINT32_MAX);
 }
 
 /*