diff --git a/README.md b/README.md
index 6dac97a..cb039c5 100644
--- a/README.md
+++ b/README.md
@@ -38,7 +38,7 @@ For example file **012C_cmn_data.dat** describe :
 - the 13th file off the pzz,
 - initialy compressed,
 - in a pzz named "cmn_data.pzz",
-- and that has been uncompressed,
+- that has been uncompressed,
 - with the default format "dat".
 
 The names of unpacked files and the presence of empty unpacked files are important to keep informations relative to the initial pzz and ensure a correct pack.