diff --git a/lemon/config.h.in b/lemon/config.h.in
--- a/lemon/config.h.in
+++ b/lemon/config.h.in
@@ -11,4 +11,7 @@
 #undef HAVE_GLPK
 
 /* Define to 1 if you have SOPLEX */
-#undef HAVE_SOPLEX
\ No newline at end of file
+#undef HAVE_SOPLEX
+
+/* Define to 1 if you have CLP */
+#undef HAVE_CLP