diff --git a/source/blender/python/generic/mathutils_vector.c b/source/blender/python/generic/mathutils_vector.c
index 4dd2e250804..68cf4c098d8 100644
--- a/source/blender/python/generic/mathutils_vector.c
+++ b/source/blender/python/generic/mathutils_vector.c
@@ -353,7 +353,7 @@ static PyObject *Vector_ToTrackQuat(VectorObject *self, PyObject *args )
 			case 'X':
 				up = 0;
 				break;
-			case 'y':
+			case 'Y':
 				up = 1;
 				break;
 			case 'Z':