From da3375f68271e5791109b5bcc6788d82b3944d9c Mon Sep 17 00:00:00 2001
From: Alexander Alekhin <alexander.a.alekhin@gmail.com>
Date: Sat, 3 Nov 2018 14:57:16 +0000
Subject: [PATCH] sfm: fix build with Ceres

---
 modules/sfm/src/simple_pipeline.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/modules/sfm/src/simple_pipeline.cpp b/modules/sfm/src/simple_pipeline.cpp
index 77ab77876..a08161084 100644
--- a/modules/sfm/src/simple_pipeline.cpp
+++ b/modules/sfm/src/simple_pipeline.cpp
@@ -37,6 +37,9 @@
 
 #if CERES_FOUND
 
+// Eigen
+#include <Eigen/Core>
+
 #include <opencv2/core/eigen.hpp>
 #include <opencv2/xfeatures2d.hpp>