diff --git a/win32/Makefile.sub b/win32/Makefile.sub
index 43349bf5f3..ff3a43774e 100644
--- a/win32/Makefile.sub
+++ b/win32/Makefile.sub
@@ -1347,6 +1347,10 @@ win32/win32.$(OBJEXT): {$(VPATH)}id.h
 dir.$(OBJEXT) win32/win32.$(OBJEXT): {$(srcdir)}win32/dir.h
 file.$(OBJEXT) win32/win32.$(OBJEXT): {$(VPATH)}win32/file.h
 
+!if "$(srcdir)" != "." && "$(HAVE_BASERUBY)" == "yes"
+revision.h: $(REVISION_H)
+!endif
+
 ext/extinit.obj: ext/extinit.c $(SETUP)
 	$(ECHO) compiling ext/extinit.c
 	$(Q) $(CC) $(CFLAGS) $(XCFLAGS) $(CPPFLAGS) $(COUTFLAG)$@ -c ext/extinit.c