diff --git a/CMakeLists.txt b/CMakeLists.txt
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -17,7 +17,7 @@
 ADD_DEFINITIONS(-DHAVE_CONFIG_H)
 
 INCLUDE(CheckTypeSize)
-CHECK_TYPE_SIZE("long long" LONG_LONG)
+CHECK_TYPE_SIZE("long long" LEMON_LONG_LONG)
 
 ENABLE_TESTING()