diff --git a/src/common/options.h b/src/common/options.h
--- a/src/common/options.h
+++ b/src/common/options.h
@@ -45,7 +45,7 @@ struct options_common
 
   Options should be kept alive during the program's life.
 
-  The environment variable DISTREN_CONFIG, the built-in default config file location, or arguments passed on the commandline are used to determine the prefix of the config file name. Order of precedence: The command line is used first, then the environment variable, and then the default if no others sources specify the prefix.
+  The environment variable DISTREN_CONFIG_PREFIX, the built-in default config file location, or arguments passed on the commandline are used to determine the prefix of the config file name. Order of precedence: The command line is used first, then the environment variable, and then the default if no others sources specify the prefix.
 
   A calling function must call options_init() before processing its own arguments so that the libdistrencommon-specific help listing may be shown. The caller must also ignore libdistrencommon specific options. To avoid complication, those arguments are "c:h". Obviously, "h" should be handled sspecially ;-) (i.e., the caller should not ignore the "h" switch... it should output information about arguments it supports). Of course, calling functions could just rely on the