diff --git a/README.md b/README.md
index d7c4daf..bcb504e 100644
--- a/README.md
+++ b/README.md
@@ -100,6 +100,11 @@ Set
 <set> |= <set>
 ```
 
+```python
+<set>.remove(<el>)   # Throws error.
+<set>.discard(<el>)  # Doesn't throw error.
+```
+
 ```python
 <set>  = <set>.union(<coll.>)                 # Or: <set> | <set>
 <set>  = <set>.intersection(<coll.>)          # Or: <set> & <set>