diff --git a/CMakeLists.txt b/CMakeLists.txt
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -17,8 +17,6 @@
 FIND_PACKAGE(CPLEX)
 FIND_PACKAGE(COIN)
 
-ADD_DEFINITIONS(-DHAVE_CONFIG_H)
-
 IF(MSVC)
   SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /wd4250 /wd4355 /wd4800 /wd4996")
 # Suppressed warnings:
@@ -29,7 +27,7 @@
 ENDIF(MSVC)
 
 INCLUDE(CheckTypeSize)
-CHECK_TYPE_SIZE("long long" LONG_LONG)
+CHECK_TYPE_SIZE("long long" LEMON_LONG_LONG)
 
 ENABLE_TESTING()