diff --git a/alsactl/alsactl.1 b/alsactl/alsactl.1
index f9bcaef..d7f30f6 100644
--- a/alsactl/alsactl.1
+++ b/alsactl/alsactl.1
@@ -66,7 +66,9 @@ Remove runstate file at first.
 
 .TP
 \fI\-E, \-\-env\fP #=#
-Set environment variable (useful for init action).
+Set environment variable (useful for init action or you may override
+ALSA_CONFIG_PATH to read different or optimized configuration - may be
+useful for "boot" scripts).
 
 .TP
 \fI\-i, \-\-initfile\fP #=#