diff --git a/README.md b/README.md
index cbc919e4cfe0acdec39a62afab101dee1da49edf..48c39983c59ccf9e284c44df07be5135f4cfc9ba 100644
--- a/README.md
+++ b/README.md
@@ -14,7 +14,7 @@ Program main loop
 
 - Eventually acquires the profiling data.
 - Check if it is the iteration limit and pauses in this case.
-- Wait for the keyboard or the waiting semaphores
+- Wait for the keyboard ( period == -1) or a waiting semaphores
 - Ready to start, updates the timer
 
      {