diff --git a/src/loader.ts b/src/loader.ts
index fe4b7dd..777b4f4 100644
--- a/src/loader.ts
+++ b/src/loader.ts
@@ -374,8 +374,8 @@ function mergeMappings(state:State, destination, source) {
   }
 }
 
-function storeMappingPair(state:State, _result:ast.YamlMap, keyTag, keyNode:ast.YAMLNode,
-                          valueNode:ast.YAMLNode):ast.YamlMap {
+function storeMappingPair(state:State, _result:ast.YAMLMap, keyTag, keyNode:ast.YAMLNode,
+                          valueNode:ast.YAMLNode):ast.YAMLMap {
   var index, quantity;
     if (keyNode==null){
         return;
@@ -885,7 +885,7 @@ function readFlowCollection(state:State, nodeIndent) {
     }
 
     if (isMapping) {
-      storeMappingPair(state, (<ast.YamlMap>_result), keyTag, keyNode, valueNode);
+      storeMappingPair(state, (<ast.YAMLMap>_result), keyTag, keyNode, valueNode);
     } else if (isPair) {
         var mp=storeMappingPair(state, null, keyTag, keyNode, valueNode);
         mp.parent=_result;
diff --git a/src/yamlAST.ts b/src/yamlAST.ts
index d82bc63..246feb2 100644
--- a/src/yamlAST.ts
+++ b/src/yamlAST.ts
@@ -60,9 +60,10 @@ export interface YAMLMapping extends YAMLNode{
 export interface YAMLSequence extends YAMLNode{
     items:YAMLNode[]
 }
-export interface YamlMap extends YAMLNode{
+export interface YAMLMap extends YAMLNode{
     mappings:YAMLMapping[]
 }
+export type YamlMap = YAMLMap; // keep it for backward compatibility
 export function newMapping(key:YAMLScalar,value:YAMLNode):YAMLMapping{
     var end = (value ? value.endPosition : key.endPosition + 1); //FIXME.workaround, end should be defied by position of ':'
     //console.log('key: ' + key.value + ' ' + key.startPosition + '..' + key.endPosition + ' ' + value + ' end: ' + end);
@@ -117,7 +118,7 @@ export function newItems():YAMLSequence{
 export function newSeq():YAMLSequence{
     return newItems();
 }
-export function newMap(mappings?: YAMLMapping[]):YamlMap{
+export function newMap(mappings?: YAMLMapping[]):YAMLMap {
     return {
         errors:[],
         startPosition:-1,