diff --git a/CMakeLists.txt b/CMakeLists.txt
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -18,7 +18,8 @@
 FIND_PACKAGE(COIN)
 
 INCLUDE(CheckTypeSize)
-CHECK_TYPE_SIZE("long long" LEMON_LONG_LONG)
+CHECK_TYPE_SIZE("long long" LONG_LONG)
+SET(LEMON_HAVE_LONG_LONG ${HAVE_LONG_LONG})
 
 ENABLE_TESTING()