diff --git a/examples/test.js b/examples/test.js
index 5513781..83afa48 100644
--- a/examples/test.js
+++ b/examples/test.js
@@ -1,6 +1,5 @@
 var cv = require('../lib/opencv');
 
-var mat = new cv.Matrix(1, 2, cv.Constants.CV_8U, [1]);
+var mat = new cv.Matrix(1, 2, cv.Constants.CV_8UC3, [1]);
 var row = mat.pixelRow(0);
 console.log("mat: " + row[0] + row[1]);
-
diff --git a/src/Matrix.cc b/src/Matrix.cc
index 39d7002..faff68d 100755
--- a/src/Matrix.cc
+++ b/src/Matrix.cc
@@ -198,7 +198,7 @@ double Matrix::DblGet(cv::Mat mat, int i, int j) {
 
   switch (mat.type()) {
     case CV_32FC3:
-      pix = mat.at<cv::Vec3b>(i, j);
+      pix = mat.at<cv::Vec3f>(i, j);
       pint |= (uchar) pix.val[2];
       pint |= ((uchar) pix.val[1]) << 8;
       pint |= ((uchar) pix.val[0]) << 16;
@@ -281,9 +281,9 @@ NAN_METHOD(Matrix::Set) {
     switch (self->mat.type()) {
       case CV_32FC3:
         vint = static_cast<unsigned int>(val + 0.5);
-        self->mat.at<cv::Vec3b>(i, j)[0] = (uchar) (vint >> 16) & 0xff;
-        self->mat.at<cv::Vec3b>(i, j)[1] = (uchar) (vint >> 8) & 0xff;
-        self->mat.at<cv::Vec3b>(i, j)[2] = (uchar) (vint) & 0xff;
+        self->mat.at<cv::Vec3f>(i, j)[0] = (uchar) (vint >> 16) & 0xff;
+        self->mat.at<cv::Vec3f>(i, j)[1] = (uchar) (vint >> 8) & 0xff;
+        self->mat.at<cv::Vec3f>(i, j)[2] = (uchar) (vint) & 0xff;
         // printf("!!!i %x, %x, %x", (vint >> 16) & 0xff, (vint >> 8) & 0xff, (vint) & 0xff);
         break;
       default: