diff --git a/lemon/config.h.cmake b/lemon/config.h.cmake
--- a/lemon/config.h.cmake
+++ b/lemon/config.h.cmake
@@ -1,3 +1,4 @@
+#define LEMON_VERSION "@PROJECT_VERSION@"
 #cmakedefine LEMON_HAVE_LONG_LONG 1
 #cmakedefine LEMON_HAVE_LP 1
 #cmakedefine LEMON_HAVE_MIP 1