diff --git a/src/vim.h b/src/vim.h
index a4c9d59..eb7d2a7 100644
--- a/src/vim.h
+++ b/src/vim.h
@@ -15,6 +15,7 @@
     defined(FEAT_PYTHON) || \
     defined(FEAT_RUBY) || \
     defined(FEAT_TCL) || \
+    defined(FEAT_MZSCHEME) || \
     defined(DYNAMIC_GETTEXT) || \
     defined(DYNAMIC_ICONV) || \
     defined(DYNAMIC_IME) || \