diff --git a/demo/CMakeLists.txt b/demo/CMakeLists.txt
--- a/demo/CMakeLists.txt
+++ b/demo/CMakeLists.txt
@@ -1,7 +1,6 @@
 INCLUDE_DIRECTORIES(
   ${CMAKE_SOURCE_DIR}
   ${CMAKE_BINARY_DIR}
-  ${GLPK_INCLUDE_DIR}
 )
 
 LINK_DIRECTORIES(${CMAKE_BINARY_DIR}/lemon)
diff --git a/lemon/CMakeLists.txt b/lemon/CMakeLists.txt
--- a/lemon/CMakeLists.txt
+++ b/lemon/CMakeLists.txt
@@ -1,7 +1,6 @@
 INCLUDE_DIRECTORIES(
   ${CMAKE_SOURCE_DIR}
   ${CMAKE_BINARY_DIR}
-  ${GLPK_INCLUDE_DIR}
 )
 
 CONFIGURE_FILE(
@@ -19,6 +18,12 @@
 
 IF(HAVE_GLPK)
   SET(LEMON_SOURCES ${LEMON_SOURCES} glpk.cc)
+  INCLUDE_DIRECTORIES(${GLPK_INCLUDE_DIR})
+  IF(WIN32)
+    INSTALL(FILES ${GLPK_BIN_DIR}/glpk.dll DESTINATION bin)
+    INSTALL(FILES ${GLPK_BIN_DIR}/libltdl3.dll DESTINATION bin)
+    INSTALL(FILES ${GLPK_BIN_DIR}/zlib1.dll DESTINATION bin)
+  ENDIF(WIN32)
 ENDIF(HAVE_GLPK)
 
 ADD_LIBRARY(lemon ${LEMON_SOURCES})
@@ -33,9 +38,3 @@
   DESTINATION include/lemon
   COMPONENT headers
   FILES_MATCHING PATTERN "*.h")
-
-IF(WIN32)
-  INSTALL(FILES ${GLPK_BIN_DIR}/glpk.dll DESTINATION bin)
-  INSTALL(FILES ${GLPK_BIN_DIR}/libltdl3.dll DESTINATION bin)
-  INSTALL(FILES ${GLPK_BIN_DIR}/zlib1.dll DESTINATION bin)
-ENDIF(WIN32)
diff --git a/test/CMakeLists.txt b/test/CMakeLists.txt
--- a/test/CMakeLists.txt
+++ b/test/CMakeLists.txt
@@ -1,9 +1,12 @@
 INCLUDE_DIRECTORIES(
   ${CMAKE_SOURCE_DIR}
   ${CMAKE_BINARY_DIR}
-  ${GLPK_INCLUDE_DIR}
 )
 
+IF(HAVE_GLPK)
+  INCLUDE_DIRECTORIES(${GLPK_INCLUDE_DIR})
+ENDIF(HAVE_GLPK)
+
 LINK_DIRECTORIES(${CMAKE_BINARY_DIR}/lemon)
 
 SET(TESTS
@@ -35,10 +38,12 @@
 
 IF(HAVE_LP)
   ADD_EXECUTABLE(lp_test lp_test.cc)
-  TARGET_LINK_LIBRARIES(lp_test lemon ${GLPK_LIBRARIES})
+  IF(HAVE_GLPK)
+    TARGET_LINK_LIBRARIES(lp_test lemon ${GLPK_LIBRARIES})
+  ENDIF(HAVE_GLPK)
   ADD_TEST(lp_test lp_test)
 
-  IF(WIN32)
+  IF(WIN32 AND HAVE_GLPK)
     GET_TARGET_PROPERTY(TARGET_LOC lp_test LOCATION)
     GET_FILENAME_COMPONENT(TARGET_PATH ${TARGET_LOC} PATH)
     ADD_CUSTOM_COMMAND(TARGET lp_test POST_BUILD
@@ -46,15 +51,17 @@
       COMMAND cmake -E copy ${GLPK_BIN_DIR}/libltdl3.dll ${TARGET_PATH}
       COMMAND cmake -E copy ${GLPK_BIN_DIR}/zlib1.dll ${TARGET_PATH}
     )
-  ENDIF(WIN32)
+  ENDIF(WIN32 AND HAVE_GLPK)
 ENDIF(HAVE_LP)
 
 IF(HAVE_MIP)
   ADD_EXECUTABLE(mip_test mip_test.cc)
-  TARGET_LINK_LIBRARIES(mip_test lemon ${GLPK_LIBRARIES})
+  IF(HAVE_GLPK)
+    TARGET_LINK_LIBRARIES(mip_test lemon ${GLPK_LIBRARIES})
+  ENDIF(HAVE_GLPK)
   ADD_TEST(mip_test mip_test)
 
-  IF(WIN32)
+  IF(WIN32 AND HAVE_GLPK)
     GET_TARGET_PROPERTY(TARGET_LOC mip_test LOCATION)
     GET_FILENAME_COMPONENT(TARGET_PATH ${TARGET_LOC} PATH)
     ADD_CUSTOM_COMMAND(TARGET mip_test POST_BUILD
@@ -62,7 +69,7 @@
       COMMAND cmake -E copy ${GLPK_BIN_DIR}/libltdl3.dll ${TARGET_PATH}
       COMMAND cmake -E copy ${GLPK_BIN_DIR}/zlib1.dll ${TARGET_PATH}
     )
-  ENDIF(WIN32)
+  ENDIF(WIN32 AND HAVE_GLPK)
 ENDIF(HAVE_MIP)
 
 FOREACH(TEST_NAME ${TESTS})