diff --git a/CMakeLists.txt b/CMakeLists.txt
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -23,8 +23,10 @@
 INCLUDE(FindDoxygen)
 INCLUDE(FindGhostscript)
 
+ADD_DEFINITIONS(-DHAVE_CONFIG_H)
+
 INCLUDE(CheckTypeSize)
-CHECK_TYPE_SIZE("long long" LONG_LONG)
+CHECK_TYPE_SIZE("long long" LEMON_LONG_LONG)
 
 ENABLE_TESTING()