diff --git a/src/Constants.cc b/src/Constants.cc
index e5b3b68..1d9696b 100644
--- a/src/Constants.cc
+++ b/src/Constants.cc
@@ -4,6 +4,9 @@
 #define CONST(C) \
   obj->Set(NanNew<String>(#C), NanNew<Integer>(C));
 
+#define CONST_ENUM(C) \
+    obj->Set(NanNew<String>(#C), NanNew<Integer>((int)(cv::C)));
+
 void
 Constants::Init(Handle<Object> target) {
   Persistent<Object> inner;
@@ -54,6 +57,12 @@ Constants::Init(Handle<Object> target) {
   CONST(CV_64FC3);
   CONST(CV_64FC4);
 
+  CONST_ENUM(INTER_NEAREST);
+  CONST_ENUM(INTER_LINEAR);
+  CONST_ENUM(INTER_AREA);
+  CONST_ENUM(INTER_CUBIC);
+  CONST_ENUM(INTER_LANCZOS4);
+
   target->Set(NanNew("Constants"), obj);
 }