diff --git a/configure.in b/configure.in
index 8869b01..0d4818a 100644
--- a/configure.in
+++ b/configure.in
@@ -2316,6 +2316,7 @@ if test "$with_dln_a_out" != yes; then
 			XLDFLAGS="$XLDFLAGS -Wl,--stack,0x00200000,--enable-auto-import"
 			DLDFLAGS="${DLDFLAGS} -Wl,--enable-auto-image-base,--enable-auto-import"
 			: ${LIBPATHENV=""}
+			: ${LIBPATHFLAG=""}
 			rb_cv_dlopen=yes],
 	[hiuxmpp], [	: ${LDSHARED='$(LD) -r'}],
 	[atheos*], [	: ${LDSHARED='$(CC) -shared'}
diff --git a/lib/mkmf.rb b/lib/mkmf.rb
index b499eeb..69f70cf 100644
--- a/lib/mkmf.rb
+++ b/lib/mkmf.rb
@@ -1824,7 +1824,7 @@ RUBY_SO_NAME = #{CONFIG['RUBY_SO_NAME']}
 arch = #{CONFIG['arch']}
 sitearch = #{CONFIG['sitearch']}
 ruby_version = #{RbConfig::CONFIG['ruby_version']}
-ruby = #{$ruby}
+ruby = #{$extmk ? $ruby : $ruby.quote}
 RUBY = $(ruby#{sep})
 ruby_headers = #{headers.join(' ')}