diff --git a/env.go b/env.go
index f6c7a4f..0352a10 100644
--- a/env.go
+++ b/env.go
@@ -37,15 +37,15 @@ func (c *envConfig) Load(ctx context.Context) error {
 		}
 	}
 
-	dst, err := config.Zero(c.opts.Struct)
+	src, err := config.Zero(c.opts.Struct)
 	if err == nil {
-		err = c.fillValues(ctx, reflect.ValueOf(dst))
+		err = c.fillValues(ctx, reflect.ValueOf(src))
 	}
 	if err != nil && !c.opts.AllowFail {
 		return err
 	}
 
-	if err = mergo.Merge(c.opts.Struct, dst, mergo.WithOverride, mergo.WithTypeCheck, mergo.WithAppendSlice); err != nil && !c.opts.AllowFail {
+	if err = mergo.Merge(c.opts.Struct, src, mergo.WithOverride, mergo.WithTypeCheck, mergo.WithAppendSlice); err != nil && !c.opts.AllowFail {
 		return err
 	}