updated for version 7.0b
diff --git a/src/if_mzsch.h b/src/if_mzsch.h
index 98bcf74..b745cce 100644
--- a/src/if_mzsch.h
+++ b/src/if_mzsch.h
@@ -9,7 +9,10 @@
 # define __CYGWIN32__
 #endif
 
-#include <scheme.h>
+/* #ifdef needed for "make depend" */
+#ifdef FEAT_MZSCHEME
+# include <scheme.h>
+#endif
 
 #ifdef __MINGW32__
 # undef __CYGWIN32__