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)