diff --git a/envconf.go b/envconf.go
index c183e6e..61ae76c 100644
--- a/envconf.go
+++ b/envconf.go
@@ -23,7 +23,7 @@ type cEntry struct {
 type Config struct {
 	parsed bool
 	env    map[string]cEntry
-	mapEnv map[string]map[string]cEntry
+	mapEnv map[string]map[string]string
 }
 
 // NewConfig returns an envconf.Config that is used to read configuration from environment variables.
@@ -33,27 +33,30 @@ func NewConfig() *Config {
 	config := new(Config)
 	config.parsed = false
 	config.env = make(map[string]cEntry)
-	config.mapEnv = make(map[string]map[string]cEntry)
+	config.mapEnv = make(map[string]map[string]string)
 
 	for _, v := range os.Environ() {
 		splitted := strings.SplitN(v, "=", 2)
 		if len(splitted) == 2 {
 			key := cleanKey(splitted[0])
-			left, right, mappable := keySplit(key)
-
+			val := splitted[1]
+			splitted = strings.Split(key, "_")
 			if unicode.IsLetter(getFirstRune(key)) {
 				var entry cEntry
-				entry.value = splitted[1]
+				entry.value = val
 				entry.dtype = TypeNone
 				entry.unset = false
 				entry.empty = false
 				config.env[key] = entry
-				if mappable {
-					if len(config.mapEnv[left]) == 0 {
-						config.mapEnv[left] = make(map[string]cEntry)
+				if len(splitted) > 1 {
+					for count, _ := range splitted {
+						left := strings.Join(splitted[:count], "_")
+						right := strings.Join(splitted[count:], "_")
+						if len(config.mapEnv[left]) == 0 {
+							config.mapEnv[left] = make(map[string]string)
+						}
+						config.mapEnv[left][right] = key
 					}
-
-					config.mapEnv[left][right] = entry
 				}
 			}
 		}
@@ -84,9 +87,10 @@ func (c *Config) DefineMap(key string, dtype DataType) {
 	key = cleanKey(key)
 	entries, ok := c.mapEnv[key]
 	if ok {
-		for mapKey, entry := range entries {
+		for _, key = range entries {
+			entry := c.env[key]
 			entry.dtype = dtype
-			c.mapEnv[key][mapKey] = entry
+			c.env[key] = entry
 		}
 	}
 }
@@ -136,13 +140,6 @@ func (c *Config) Parse() {
 		}
 	}
 
-	for k, v := range c.mapEnv {
-		for mk, mv := range v {
-			mv.parsed = mv.dtype.parse(k+"_"+mk, mv.value)
-			c.mapEnv[k][mk] = mv
-		}
-	}
-
 	if failed {
 		for k, v := range c.env {
 			if (v.parsed.err == nil) && v.unset {
@@ -234,17 +231,7 @@ func (c *Config) Status() (ok bool) {
 				}
 			}
 		}
-		for _, v := range c.mapEnv {
-			for _, mv := range v {
-				err := mv.parsed.err
-				if err != nil {
-					ok = false
-					if !mv.empty {
-						fmt.Fprintln(os.Stderr, err)
-					}
-				}
-			}
-		}
+
 		if !ok {
 			fmt.Fprintln(os.Stderr, "")
 			for _, v := range c.env {
@@ -303,8 +290,9 @@ func (c *Config) getRawMap(key string, dtype DataType) (empty map[string]cValue)
 
 		if ok {
 			for k, v := range entries {
-				if (v.dtype.baseType() == dtype.baseType()) && (v.parsed.err == nil) {
-					retval[k] = v.parsed
+				entry := c.env[v]
+				if (entry.dtype.baseType() == dtype.baseType()) && (entry.parsed.err == nil) {
+					retval[k] = entry.parsed
 				} else {
 					return
 				}