1 files changed, 2 insertions, 1 deletions
diff --git a/README b/README
index 4fce592..32e716d 100644
--- a/README
+++ b/README
@@ -196,7 +196,8 @@ parameters:
                    - use the given command _before_ running the normal
                      |install-xpi| procedure. This parameter is useful for all
                      those extension sources that have a command/make target
-                     to produce a XPI.
+                     to produce a XPI. If a developer doesn't provide the
+                     command, the default one will be used.
  MOZ_XPI_MOZILLA_DIRS
                    - link the extension to the global |extensions| directory
                      of the given MOZILLAs. The default value is |firefox| and