diff --git a/ChangeLog b/ChangeLog
index 6369f72580..f8ea0a65a7 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+Wed Jul  5 01:02:53 2000  WATANABE Hirofumi  <eban@os.rim.or.jp>
+
+	* ext/extmk.rb.in: join ' ' -> join(' ').
+
+	* lib/mkmf.rb: ditto.
+
 Tue Jul  4 13:51:29 2000  Yukihiro Matsumoto  <matz@netlab.co.jp>
 
 	* ext/dbm/dbm.c: add methods added to Hash in 1.5.x.
diff --git a/ext/extmk.rb.in b/ext/extmk.rb.in
index e31626336a..b1eab87a03 100644
--- a/ext/extmk.rb.in
+++ b/ext/extmk.rb.in
@@ -421,7 +421,7 @@ TARGET = #{target}
 DLLIB = $(TARGET).#{$static ? $LIBEXT : "@DLEXT@"}
 
 RUBY = #{ruby_interpreter} -I$(topdir) -I$(hdrdir)/lib
-RM = $(RUBY) -r ftools -e "File::rm_f *Dir[ARGV.join ' ']"
+RM = $(RUBY) -r ftools -e 'File::rm_f(*Dir[ARGV.join(" ")])'
 
 EXEEXT = @EXEEXT@
 
diff --git a/lib/mkmf.rb b/lib/mkmf.rb
index d09b85b875..38b93f5b65 100644
--- a/lib/mkmf.rb
+++ b/lib/mkmf.rb
@@ -405,7 +405,7 @@ TARGET = #{target}
 DLLIB = $(TARGET).#{CONFIG["DLEXT"]}
 
 RUBY = #{CONFIG["ruby_install_name"]}
-RM = $(RUBY) -r ftools -e 'File::rm_f *Dir[ARGV.join " "]'
+RM = $(RUBY) -r ftools -e 'File::rm_f(*Dir[ARGV.join(" ")])'
 
 EXEEXT = #{CONFIG["EXEEXT"]}