diff --git a/econfig/config.go b/econfig/config.go
index 27c1214..8def371 100644
--- a/econfig/config.go
+++ b/econfig/config.go
@@ -53,6 +53,8 @@ var (
 //
 // Also processes -help or -h and prints usage and quits immediately.
 func Config(cfg any, defaultFile ...string) ([]string, error) {
+	ConfigFile = ""
+
 	var errs []error
 	err := SetFromDefaults(cfg)
 	if err != nil {