diff --git a/cst311/lec/lec9.md b/cst311/lec/lec9.md
index 6536d2e..f666afa 100644
--- a/cst311/lec/lec9.md
+++ b/cst311/lec/lec9.md
@@ -21,7 +21,7 @@ Note that this syntax is simlar to multiplication so `a*b` is equivalent to the
 `!a` is equivalent to saying not `a`.
 We can also denote it with a bar over the expression we want to _not_.
 
-![Figure-Not](../img/syn-not.png)
+![Figure-Not](../img/fig-not.png)
 
 ## Decoders