diff --git a/envconf.go b/envconf.go
index 2a61401..813ff7d 100644
--- a/envconf.go
+++ b/envconf.go
@@ -86,6 +86,7 @@ func (c *Config) Define(key string, dtype DataType) {
 // Variables without a defined type will be ignored by Parse.
 func (c *Config) DefineMap(key string, dtype DataType) {
 	key = cleanKey(key)
+	fmt.Println(c.mapEnv)
 	entries, ok := c.mapEnv[key]
 	if ok {
 		for _, key = range entries {