diff --git a/Configuration/Geometry/README.md b/Configuration/Geometry/README.md
index a79edbcd3e1f0..d57eda4a0ba22 100644
--- a/Configuration/Geometry/README.md
+++ b/Configuration/Geometry/README.md
@@ -77,7 +77,7 @@ Fast Timing system:
 * I11: Same as I10, xml reorganized, comparison base for new ETL and DD4hep migration
 * I12: Starting from I11, new ETL layout from MTD TDR
 * I13: Starting from I11, new ETL layout from post MTD TDR (2 sectors per disc face)
-* I14: Same as I13, updated sensor structure, disc z location and passive ,aterials
+* I14: Same as I13, updated sensor structure, disc z location and passive materials
 
 The script also handles the common and forward elements of the geometry:
 * O4: detailed cavern description, changes for modified CALO region for endcap part, no overlaps inside the Muon System