diff --git a/ChangeLog b/ChangeLog
index 7dd28a371c..d81a81461b 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Tue Jul  4 13:20:56 2000  WATANABE Hirofumi  <eban@os.rim.or.jp>
+
+	* ext/extmk.rb.in: make command line must be single-quoted.
+	  $(RUBY_INSTALL_NAME) is command substitution in the POSIX sh.
+
 Tue Jul  4 13:16:02 2000  Yukihiro Matsumoto  <matz@netlab.co.jp>
 
 	* util.c (rb_type): should add T_UNDEF.
diff --git a/ext/extmk.rb.in b/ext/extmk.rb.in
index 7622880a1a..e31626336a 100644
--- a/ext/extmk.rb.in
+++ b/ext/extmk.rb.in
@@ -673,7 +673,7 @@ if $extlist.size > 0
   if RUBY_PLATFORM =~ /m68k-human|beos/
     $extlibs.gsub!("-L/usr/local/lib", "") if $extlibs
   end
-  system format(%[#{$make} #{ruby} EXTOBJS="%s" EXTLIBS="%s"], $extobjs, $extlibs)
+  system format(%[#{$make} #{ruby} EXTOBJS='%s' EXTLIBS='%s'], $extobjs, $extlibs)
 else
   Dir.chdir ".."
   if older(ruby, miniruby)