diff --git a/lib/fault-inject.c b/lib/fault-inject.c
index f7210ad6cffd44c2486f8fef542dc5fa5affdae3..c5c7a762b850a30f23ad28e5a0f3a1f2e17e32be 100644
--- a/lib/fault-inject.c
+++ b/lib/fault-inject.c
@@ -122,7 +122,7 @@ bool should_fail(struct fault_attr *attr, ssize_t size)
 			return false;
 	}
 
-	if (attr->probability <= random32() % 100)
+	if (attr->probability <= prandom_u32() % 100)
 		return false;
 
 	if (!fail_stacktrace(attr))
diff --git a/lib/list_sort.c b/lib/list_sort.c
index d7325c6b103f0be078ff3672c35c468ed35738f1..1183fa70a44d26cfc673b6d5d2f645b7026f50dd 100644
--- a/lib/list_sort.c
+++ b/lib/list_sort.c
@@ -229,7 +229,7 @@ static int __init list_sort_test(void)
 			goto exit;
 		}
 		 /* force some equivalencies */
-		el->value = random32() % (TEST_LIST_LEN/3);
+		el->value = prandom_u32() % (TEST_LIST_LEN / 3);
 		el->serial = i;
 		el->poison1 = TEST_POISON1;
 		el->poison2 = TEST_POISON2;