diff --git a/src/config.h.in b/src/config.h.in
index f6c7fa4..4c3a89b 100644
--- a/src/config.h.in
+++ b/src/config.h.in
@@ -349,6 +349,9 @@
 /* Define if you want to include the Ruby interpreter. */
 #undef FEAT_RUBY
 
+/* Define for linking via dlopen() or LoadLibrary() */
+#undef DYNAMIC_RUBY
+
 /* Define if you want to include the Tcl interpreter. */
 #undef FEAT_TCL