diff --git a/src/Constants.cc b/src/Constants.cc
index e2f8768..41ea703 100644
--- a/src/Constants.cc
+++ b/src/Constants.cc
@@ -62,6 +62,17 @@ void Constants::Init(Local<Object> target) {
   CONST(CV_64FC3);
   CONST(CV_64FC4);
 
+  CONST(CV_LOAD_IMAGE_UNCHANGED);
+  CONST(CV_LOAD_IMAGE_GRAYSCALE);
+  CONST(CV_LOAD_IMAGE_COLOR);
+  CONST(CV_LOAD_IMAGE_ANYDEPTH);
+  CONST(CV_LOAD_IMAGE_ANYCOLOR);
+  
+  // this is 3.2+ only
+  #if ((CV_MAJOR_VERSION == 3) && (CV_MINOR_VERSION >=2))
+  CONST(CV_LOAD_IMAGE_IGNORE_ORIENTATION);
+  #endif
+  
   CONST_DOUBLE(CV_PI);
   CONST(CV_FILLED);