diff --git a/src/Core/CoreConstants.php b/src/Core/CoreConstants.php
index 28b72e5d..7faf9226 100644
--- a/src/Core/CoreConstants.php
+++ b/src/Core/CoreConstants.php
@@ -68,7 +68,7 @@ class CoreConstants
      * Current QuickBooks Namespace for PHP SDK
      * @var int Deflate
      */
-    const NAMEPSACE_DATA_PREFIX = 'QuickBooksOnline\\API\\Data\\';
+    const NAMESPACE_DATA_PREFIX = 'QuickBooksOnline\\API\\Data\\';
 
     /**
      * OAuth 1 Mode constant.
diff --git a/src/Core/Http/Serialization/XmlObjectSerializer.php b/src/Core/Http/Serialization/XmlObjectSerializer.php
index 0db71af5..a7f55f50 100644
--- a/src/Core/Http/Serialization/XmlObjectSerializer.php
+++ b/src/Core/Http/Serialization/XmlObjectSerializer.php
@@ -86,8 +86,8 @@ private static function PhpObjFromXml($className, $xmlStr)
         $className = trim($className);
         if (class_exists($className, CoreConstants::USE_AUTOLOADER)) {
             $phpObj = new $className;
-        } elseif (class_exists(CoreConstants::NAMEPSACE_DATA_PREFIX . $className, CoreConstants::USE_AUTOLOADER)) {
-            $className = CoreConstants::NAMEPSACE_DATA_PREFIX . $className;
+        } elseif (class_exists(CoreConstants::NAMESPACE_DATA_PREFIX . $className, CoreConstants::USE_AUTOLOADER)) {
+            $className = CoreConstants::NAMESPACE_DATA_PREFIX . $className;
             $phpObj = new $className;
         } else {
             throw new \Exception("Can't find corresponding CLASS for className" . $className . "during unmarshall XML into POPO Object");
diff --git a/src/Facades/FacadeHelper.php b/src/Facades/FacadeHelper.php
index f89a03bc..44920f5e 100644
--- a/src/Facades/FacadeHelper.php
+++ b/src/Facades/FacadeHelper.php
@@ -414,7 +414,7 @@ private static function decorateKeyWithNameSpaceAndPrefix($key){
    }
 
    public static function simpleAppendClassNameSpace($key){
-      return CoreConstants::NAMEPSACE_DATA_PREFIX . CoreConstants::PHP_CLASS_PREFIX . $key;
+      return CoreConstants::NAMESPACE_DATA_PREFIX . CoreConstants::PHP_CLASS_PREFIX . $key;
    }
 
    /**
diff --git a/src/Utility/MetadataExtractor.php b/src/Utility/MetadataExtractor.php
index f05bb5de..c284ba78 100644
--- a/src/Utility/MetadataExtractor.php
+++ b/src/Utility/MetadataExtractor.php
@@ -108,7 +108,7 @@ private function addNameSpaceToPotentialClassName($name)
         $name = trim($name);
         $lists = explode('\\', $name);
         $ippEntityName = end($lists);
-        $ippEntityName = CoreConstants::NAMEPSACE_DATA_PREFIX . $ippEntityName;
+        $ippEntityName = CoreConstants::NAMESPACE_DATA_PREFIX . $ippEntityName;
         return $ippEntityName;
     }
 
diff --git a/src/XSD2PHP/src/com/mikebevz/xsd2php/Bind.php b/src/XSD2PHP/src/com/mikebevz/xsd2php/Bind.php
index addf3013..11710ab7 100644
--- a/src/XSD2PHP/src/com/mikebevz/xsd2php/Bind.php
+++ b/src/XSD2PHP/src/com/mikebevz/xsd2php/Bind.php
@@ -153,8 +153,8 @@ public function bindXml($xml, $model)
                          */
                          if (class_exists($className, CoreConstants::USE_AUTOLOADER)) {
                              //Do nothing
-                         } elseif (class_exists(CoreConstants::NAMEPSACE_DATA_PREFIX . $className)) {
-                             $className = CoreConstants::NAMEPSACE_DATA_PREFIX . $className;
+                         } elseif (class_exists(CoreConstants::NAMESPACE_DATA_PREFIX . $className)) {
+                             $className = CoreConstants::NAMESPACE_DATA_PREFIX . $className;
                          } else {
                              throw new \Exception("Can't find corresponding CLASS for className" . $className . " in Bind.php");
                          }