diff --git a/ruby.c b/ruby.c
index bbf2fdb762..bf71a288d4 100644
--- a/ruby.c
+++ b/ruby.c
@@ -1676,6 +1676,8 @@ warn_cr_in_shebang(const char *str, long len)
 	rb_warn("shebang line ends with \\r may cause a problem");
     }
 }
+#else
+#define warn_cr_in_shebang(str, len) (void)0
 #endif
 
 struct load_file_arg {
@@ -1725,9 +1727,7 @@ load_file_internal(VALUE argp_v)
 		line_start++;
 		RSTRING_GETMEM(line, str, len);
 		if (len > 2 && str[0] == '#' && str[1] == '!') {
-#ifndef DOSISH
 		    if (line_start == 1) warn_cr_in_shebang(str, len);
-#endif
 		    if ((p = strstr(str+2, ruby_engine)) != 0) {
 			goto start_read;
 		    }
@@ -1745,9 +1745,7 @@ load_file_internal(VALUE argp_v)
 		    return 0;
 
 		RSTRING_GETMEM(line, str, len);
-#ifndef DOSISH
 		warn_cr_in_shebang(str, len);
-#endif
 		if ((p = strstr(str, ruby_engine)) == 0) {
 		    /* not ruby script, assume -x flag */
 		    goto search_shebang;
diff --git a/test/ruby/test_rubyoptions.rb b/test/ruby/test_rubyoptions.rb
index 6ee151e5e8..82fc5e44e7 100644
--- a/test/ruby/test_rubyoptions.rb
+++ b/test/ruby/test_rubyoptions.rb
@@ -312,9 +312,10 @@ class TestRubyOptions < Test::Unit::TestCase
     assert_in_out_err([], "#! /test_r_u_b_y_test_r_u_b_y_options_foobarbazqux -foo -bar\r\np 1\r\n",
                       [], /: no Ruby script found in input/)
 
+    warning = /mswin|mingw/ =~ RUBY_PLATFORM ? [] : /shebang line ends with \\r/
     assert_in_out_err([{'RUBYOPT' => nil}], "#!ruby -KU -Eutf-8\r\np \"\u3042\"\r\n",
-                      ["\"\u3042\""], /shebang line ends with \\r/,
-                      encoding: Encoding::UTF_8) if /mswin|mingw/ !~ RUBY_PLATFORM
+                      ["\"\u3042\""], warning,
+                      encoding: Encoding::UTF_8)
 
     bug4118 = '[ruby-dev:42680]'
     assert_in_out_err(%w[], "#!/bin/sh\n""#!shebang\n""#!ruby\n""puts __LINE__\n",