diff --git a/src/Constants.cc b/src/Constants.cc
index bf81507..523b96e 100644
--- a/src/Constants.cc
+++ b/src/Constants.cc
@@ -63,15 +63,15 @@ Constants::Init(Handle<Object> target) {
   CONST_ENUM(INTER_CUBIC);
   CONST_ENUM(INTER_LANCZOS4);
 
-  CONST(cv::NORM_MINMAX);
-  CONST(cv::NORM_INF);
-  CONST(cv::NORM_L1);
-  CONST(cv::NORM_L2);
-  CONST(cv::NORM_L2SQR);
-  CONST(cv::NORM_HAMMING);
-  CONST(cv::NORM_HAMMING2);
-  CONST(cv::NORM_RELATIVE);
-  CONST(cv::NORM_TYPE_MASK);
+  CONST_ENUM(NORM_MINMAX);
+  CONST_ENUM(NORM_INF);
+  CONST_ENUM(NORM_L1);
+  CONST_ENUM(NORM_L2);
+  CONST_ENUM(NORM_L2SQR);
+  CONST_ENUM(NORM_HAMMING);
+  CONST_ENUM(NORM_HAMMING2);
+  CONST_ENUM(NORM_RELATIVE);
+  CONST_ENUM(NORM_TYPE_MASK);
 
   target->Set(NanNew("Constants"), obj);
 }