diff --git a/README.rst b/README.rst
index 154c860c..aa339bdf 100644
--- a/README.rst
+++ b/README.rst
@@ -52,7 +52,7 @@ Without using Python:
 
       * Generate ``builder-hex0-x86-stage1.img`` from hex0 source:
 
-        ``sed 's/[;#].*$//g' builder-hex0/builder-hex0-x86-stage1-hex0 | xxd -r -p``
+        ``sed 's/[;#].*$//g' builder-hex0/builder-hex0-x86-stage1.hex0 | xxd -r -p``
       * On the first image, write ``builder-hex0-x86-stage1.img`` to it, followed
         by ``kernel-bootstrap/builder-hex0-x86-stage2.hex0``, followed by zeros
         padding the disk to the next sector.