diff --git a/envconf.go b/envconf.go
index 1093b71..b8cbf88 100644
--- a/envconf.go
+++ b/envconf.go
@@ -104,8 +104,8 @@ func (c *Config) Parse() {
 	}
 	for k, v := range c.env {
 		if failed && (v.parsed.err == nil) {
-			if v.empty {
-				if v.unset {
+			if v.unset {
+				if v.empty {
 					v.parsed.err = errors.New(fmt.Sprintf(`Environment variable "%s" not found. It should have been of type %s.`, k, v.dtype))
 					c.env[k] = v
 				} else {