diff --git a/Lib/lib-old/rand.py b/Lib/lib-old/rand.py
index 06164833284f..c299d0a9a95d 100644
--- a/Lib/lib-old/rand.py
+++ b/Lib/lib-old/rand.py
@@ -1,4 +1,5 @@
 # Module 'rand'
+# Don't use unless you want compatibility with C's rand()!
 
 import whrandom
 
diff --git a/Lib/rand.py b/Lib/rand.py
index 06164833284f..c299d0a9a95d 100644
--- a/Lib/rand.py
+++ b/Lib/rand.py
@@ -1,4 +1,5 @@
 # Module 'rand'
+# Don't use unless you want compatibility with C's rand()!
 
 import whrandom