diff --git a/09-Considering_Correctness.md b/09-Considering_Correctness.md
index 8313374..f39af90 100644
--- a/09-Considering_Correctness.md
+++ b/09-Considering_Correctness.md
@@ -25,4 +25,4 @@ Consider using a typesafe library like
 
 Note that stronger typing can also allow for more compiler optimizations.
 
-* [Sorting in C vs C++](Sorting in C vs C++.pdf)
+* [Sorting in C vs C++](Sorting%20in%20C%20vs%20C++.pdf)