diff --git a/docs/lectures/osc/05_concurrency2.md b/docs/lectures/osc/05_concurrency2.md
index 1bba7d6..701aef1 100644
--- a/docs/lectures/osc/05_concurrency2.md
+++ b/docs/lectures/osc/05_concurrency2.md
@@ -6,7 +6,7 @@
 
 Two **shared variables** are used
 
-1. *turn* - indicates which process is next to enter its critical section
+1. *turn* - indicates which process is next to enter its critical section.
 2. *Boolean flag [2]*  - indicates that a process is ready to enter its critical section
 
 * Peterson's solution can be used over multiple processes or threads