diff --git a/CMakeLists.txt b/CMakeLists.txt
index 49717b68d..f60c8bde6 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -317,10 +317,10 @@ endif()
 
 # Find eigen3 or use bundled version
 if (NOT SLIC3R_STATIC)
-    find_package(Eigen3 3)
+    find_package(Eigen3 3.3)
 endif ()
-if (NOT Eigen3_FOUND)
-    set(Eigen3_FOUND 1)
+if (NOT EIGEN3_FOUND)
+    set(EIGEN3_FOUND 1)
     set(EIGEN3_INCLUDE_DIR ${LIBDIR}/eigen/)
 endif ()
 include_directories(BEFORE SYSTEM ${EIGEN3_INCLUDE_DIR})