diff --git a/CMakeLists.txt b/CMakeLists.txt
index 6c60630..096ca71 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -47,6 +47,8 @@ if(CMAKE_BUILD_TYPE STREQUAL Debug)
   add_definitions(-D_DEBUG)
 endif()
 
+option(BUILD_SHARED_LIBS "Build using shared libraries" ON)
+
 configure_file(${CMAKE_MODULE_PATH}/uninstall.cmake.in ${CMAKE_CURRENT_BINARY_DIR}/cmake_uninstall.cmake IMMEDIATE @ONLY)
 
 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11")
diff --git a/lib/cadobjects.cpp b/lib/cadobjects.cpp
index 6abb62c..363c8e1 100644
--- a/lib/cadobjects.cpp
+++ b/lib/cadobjects.cpp
@@ -33,6 +33,7 @@
 
 #include <math.h>
 #include <algorithm>
+#include <limits>
 
 //------------------------------------------------------------------------------
 // CADVector
@@ -704,4 +705,4 @@ CADPolylinePFaceObject::CADPolylinePFaceObject()
 CADXRecordObject::CADXRecordObject()
 {
     type = XRECORD;
-}
\ No newline at end of file
+}