diff --git a/extern/libmv/libmv/simple_pipeline/camera_intrinsics.cc b/extern/libmv/libmv/simple_pipeline/camera_intrinsics.cc
index ab9b21d6dfd..6319846a079 100644
--- a/extern/libmv/libmv/simple_pipeline/camera_intrinsics.cc
+++ b/extern/libmv/libmv/simple_pipeline/camera_intrinsics.cc
@@ -209,7 +209,7 @@ void CameraIntrinsics::ComputeLookupGrid(Grid* grid, int width, int height, doub
       if( ix >= width-2 ) ix = width-2;
       if( iy >= height-2 ) iy = height-2;
 
-      Offset offset = { ix-x, iy-y, fx, fy };
+      Offset offset = { (short)(ix-x), (short)(iy-y), (unsigned char)fx, (unsigned char)fy };
       grid->offset[y*width+x] = offset;
     }
   }
diff --git a/extern/libmv/libmv/simple_pipeline/detect.cc b/extern/libmv/libmv/simple_pipeline/detect.cc
index 8ac42ab0aba..8a093dadeca 100644
--- a/extern/libmv/libmv/simple_pipeline/detect.cc
+++ b/extern/libmv/libmv/simple_pipeline/detect.cc
@@ -66,7 +66,7 @@ std::vector<Feature> DetectFAST(const unsigned char* data, int width, int height
     Feature *all_features = new Feature[num_features];
 
     for(int i = 0; i < num_features; ++i) {
-      Feature a = { nonmax[i].x, nonmax[i].y, scores[i], 0 };
+      Feature a = { (float)nonmax[i].x, (float)nonmax[i].y, (float)scores[i], 0 };
       all_features[i] = a;
     }
 
@@ -173,7 +173,7 @@ void DetectMORAVEC(ubyte* image, int stride, int width, int height, Feature* det
   for(int y=16; y<height-16; y++) {
     for(int x=16; x<width-16; x++) {
       int s = scores[y*width+x];
-      Feature f = { x+8, y+8, s, 16 };
+      Feature f = { (float)x+8.0f, (float)y+8.0f, (float)s, 16 };
       if(s>min) detected[i++] = f;
     }
   }