diff --git a/cmd/tools/vtest-fixed.v b/cmd/tools/vtest-fixed.v
index 8f7cf9b640..36c983732c 100644
--- a/cmd/tools/vtest-fixed.v
+++ b/cmd/tools/vtest-fixed.v
@@ -10,7 +10,7 @@ const (
 		'vlib/cli/command_test.v',
 		'vlib/cli/flag_test.v',
 		'vlib/crypto/aes/aes_test.v',
-		'vlib/crypto/rand/rand_test.v',
+		'vlib/crypto/rand/rand_test.v', // macOS only
 		'vlib/crypto/rc4/rc4_test.v',
 		'vlib/encoding/utf8/utf8_util_test.v',
 		'vlib/eventbus/eventbus_test.v',
diff --git a/vlib/crypto/rand/rand.v b/vlib/crypto/rand/rand.v
index f8f1c66cb2..c7f02c874b 100644
--- a/vlib/crypto/rand/rand.v
+++ b/vlib/crypto/rand/rand.v
@@ -9,7 +9,7 @@ const (
 )
 
 // NOTE: temp until we have []bytes(buff)
-fn c_array_to_bytes_tmp(len, buffer voidptr) []byte {
+fn c_array_to_bytes_tmp(len int, buffer voidptr) []byte {
 
 	mut arr := []byte
 	arr = make(len, 1, 1)
diff --git a/vlib/crypto/rand/rand_darwin.v b/vlib/crypto/rand/rand_darwin.c.v
similarity index 100%
rename from vlib/crypto/rand/rand_darwin.v
rename to vlib/crypto/rand/rand_darwin.c.v
diff --git a/vlib/crypto/rand/rand_linux.v b/vlib/crypto/rand/rand_linux.c.v
similarity index 100%
rename from vlib/crypto/rand/rand_linux.v
rename to vlib/crypto/rand/rand_linux.c.v
diff --git a/vlib/crypto/rand/rand_solaris.v b/vlib/crypto/rand/rand_solaris.c.v
similarity index 100%
rename from vlib/crypto/rand/rand_solaris.v
rename to vlib/crypto/rand/rand_solaris.c.v
diff --git a/vlib/crypto/rand/rand_windows.v b/vlib/crypto/rand/rand_windows.c.v
similarity index 100%
rename from vlib/crypto/rand/rand_windows.v
rename to vlib/crypto/rand/rand_windows.c.v