diff --git a/README.md b/README.md
index c1925786baa22759ab3007677bbab2110ab634eb..1c24f4b091a4312bf6eabbdd9cc4a3c5d3ca9046 100644
--- a/README.md
+++ b/README.md
@@ -36,7 +36,7 @@ WP 9.3.c "Understanding the interaction between soft protons and X-ray mirrors"
 * Authors: V.Fioretti(1), T. Mineo(2), R. Amato(2), S. Lotti(3), C. Macculi(3), S. Molendi(4), F. Gastaldello(4), M. Cappi(1), M. Dadina(1), S. Ettori(1)
 (1)INAF OAS Bologna, (2)INAF IASF Palermo, (3)INAF IAPS Roma, (4)INAF IASF Milano 
 
-The proton response matrix for the XMM-Newton telescope is composed by a Redistribution Matrix File (RMF)
+* Description: The proton response matrix for the XMM-Newton telescope is composed by a Redistribution Matrix File (RMF)
 mapping the proton energy space (from tens to hundreds of keV) into detector pulse height and an Auxiliary Response File (ARF) 
 collecting the grasp of the optics, the filter transmission efficiency and the detector quantum efficiency.