diff --git a/ext/dl/cfunc.c b/ext/dl/cfunc.c
index 94816204f1..458132b784 100644
--- a/ext/dl/cfunc.c
+++ b/ext/dl/cfunc.c
@@ -222,20 +222,9 @@ rb_dlcfunc_inspect(VALUE self)
     return val;
 }
 
-#if defined(__GNUC__)
-# define DECL_FUNC_CDECL(f,ret,args)  FUNC_CDECL(ret (*f)(args))
-# define DECL_FUNC_STDCALL(f,ret,args)  FUNC_STDCALL(ret (*f)(args))
-/* # define DECL_FUNC(f,ret,args,calltype)  ret (*f)(args) */
-#elif defined(_MSC_VER) || defined(__BORLANDC__)
-# define DECL_FUNC_CDECL(f,ret,args)  ret (__cdecl *f)(args)
-# define DECL_FUNC_STDCALL(f,ret,args)  ret (__stdcall *f)(args)
-#elif defined(__SUNPRO_C)
-# define DECL_FUNC(f,ret,args,calltype)  ret (*f)(args) 
-# define DECL_FUNC_CDECL(f,ret,args)  ret (*f)(args)
-# define DECL_FUNC_STDCALL(f,ret,args)  ret (*f)(args)
-#else
-# error "unsupported compiler."
-#endif
+
+# define DECL_FUNC_CDECL(f,ret,args)  ret (FUNC_CDECL(*f))(args)
+# define DECL_FUNC_STDCALL(f,ret,args)  ret (FUNC_STDCALL(*f))(args)
 
 #define CALL_CASE switch( RARRAY(ary)->len ){ \
   CASE(0); break; \
diff --git a/ext/dl/dl.c b/ext/dl/dl.c
index fcfcbd1bcc..015e76f09e 100644
--- a/ext/dl/dl.c
+++ b/ext/dl/dl.c
@@ -56,31 +56,6 @@ rb_dl_value2ptr(VALUE self, VALUE val)
     return PTR2NUM((void*)val);
 }
 
-#if defined(__GNUC__)
-# define PRE_DECL_CDECL     __attribute__((cdecl))
-# define PRE_DECL_STDCALL   __attribute__((stdcall))
-# define MIDST_DECL_CDECL
-# define MIDST_DECL_STDCALL
-# define POST_DECL_CDECL
-# define POST_DECL_STDCALL
-#elif defined(_MSC_VER) || defined(__BORLANDC__)
-# define PRE_DECL_CDECL
-# define PRE_DECL_STDCALL
-# define MIDST_DECL_CDECL     __cdecl
-# define MIDST_DECL_STDCALL   __stdcall
-# define POST_DECL_CDECL
-# define POST_DECL_STDCALL
-#elif (__SUNPRO_C)
-# define PRE_DECL_CDECL
-# define PRE_DECL_STDCALL
-# define MIDST_DECL_CDECL   
-# define MIDST_DECL_STDCALL 
-# define POST_DECL_CDECL
-# define POST_DECL_STDCALL
-#else
-# error "unsupported compiler"
-#endif
-
 #include "callback.h"
 
 void
diff --git a/ext/dl/mkcallback.rb b/ext/dl/mkcallback.rb
index 493f55b188..8526353bf3 100644
--- a/ext/dl/mkcallback.rb
+++ b/ext/dl/mkcallback.rb
@@ -111,8 +111,8 @@ for calltype in CALLTYPES
       for n in 0..(MAX_CALLBACK-1)
         $out << (<<-EOS)
 
-FUNC_#{calltype.upcase}(static #{DLTYPE[ty][:type]}
-#{func_name(ty,argc,n,calltype)}(#{(0...argc).collect{|i| "DLSTACK_TYPE stack" + i.to_s}.join(", ")}))
+static #{DLTYPE[ty][:type]}
+FUNC_#{calltype.upcase}(#{func_name(ty,argc,n,calltype)})(#{(0...argc).collect{|i| "DLSTACK_TYPE stack" + i.to_s}.join(", ")})
 {
     VALUE ret, cb#{argc > 0 ? ", args[#{argc}]" : ""};
 #{
diff --git a/ext/dl/test/test_dl2.rb b/ext/dl/test/test_dl2.rb
index e59956cf7b..8c1f3e71b4 100644
--- a/ext/dl/test/test_dl2.rb
+++ b/ext/dl/test/test_dl2.rb
@@ -94,14 +94,14 @@ class TestDL < TestBase
       assert_equal(str[0,2], ptr[0,2])
       assert_equal(str[1,2], ptr[1,2])
       assert_equal(str[1,0], ptr[1,0])
-      assert_equal(str[0], ptr[0])
-      assert_equal(str[1], ptr[1])
+      assert_equal(str[0].ord, ptr[0])
+      assert_equal(str[1].ord, ptr[1])
     }
     str = 'abc'
     ptr = CPtr[str]
     check.call(str, ptr)
-    str[0] = ?c
-    ptr[0] = ?c
+    str[0] = "c"
+    ptr[0] = "c".ord
     check.call(str, ptr)
     str[0,2] = "aa"
     ptr[0,2] = "aa"