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:
@@ -28,8 +26,6 @@
 # C4996: 'function': was declared deprecated
 ENDIF(MSVC)
 
-ADD_DEFINITIONS(-DHAVE_CONFIG_H)
-
 INCLUDE(CheckTypeSize)
 CHECK_TYPE_SIZE("long long" LEMON_LONG_LONG)
 
diff --git a/test/lp_test.cc b/test/lp_test.cc
--- a/test/lp_test.cc
+++ b/test/lp_test.cc
@@ -21,9 +21,7 @@
 #include "test_tools.h"
 #include <lemon/tolerance.h>
 
-#ifdef HAVE_CONFIG_H
 #include <lemon/config.h>
-#endif
 
 #ifdef LEMON_HAVE_GLPK
 #include <lemon/glpk.h>
diff --git a/test/mip_test.cc b/test/mip_test.cc
--- a/test/mip_test.cc
+++ b/test/mip_test.cc
@@ -18,9 +18,7 @@
 
 #include "test_tools.h"
 
-#ifdef HAVE_CONFIG_H
 #include <lemon/config.h>
-#endif
 
 #ifdef LEMON_HAVE_CPLEX
 #include <lemon/cplex.h>