diff --git a/av1/encoder/encodemv.h b/av1/encoder/encodemv.h
index ebd4d2c..c049035 100644
--- a/av1/encoder/encodemv.h
+++ b/av1/encoder/encodemv.h
@@ -44,11 +44,11 @@
                                       int is_integer);
 
 static INLINE MV_JOINT_TYPE av1_get_mv_joint(const MV *mv) {
-  if (mv->row == 0) {
-    return mv->col == 0 ? MV_JOINT_ZERO : MV_JOINT_HNZVZ;
-  } else {
-    return mv->col == 0 ? MV_JOINT_HZVNZ : MV_JOINT_HNZVNZ;
-  }
+  // row:  Z  col:  Z  | MV_JOINT_ZERO   (0)
+  // row:  Z  col: NZ  | MV_JOINT_HNZVZ  (1)
+  // row: NZ  col:  Z  | MV_JOINT_HZVNZ  (2)
+  // row: NZ  col: NZ  | MV_JOINT_HNZVNZ (3)
+  return (!!mv->col) | ((!!mv->row) << 1);
 }
 
 #ifdef __cplusplus