diff --git a/cext/src/include/ruby/asprintf.h b/cext/src/include/ruby/asprintf.h
deleted file mode 100644
index 6a6271b084c..00000000000
--- a/cext/src/include/ruby/asprintf.h
+++ /dev/null
@@ -1,80 +0,0 @@
-#if !defined(__WIN32__) && !defined(__MINGW32__)
-#   include <stdarg.h>
-#   include <errno.h>
-#endif
-
-#define INIT_SZ 128
-
-#ifndef ENOMEM
-#	define ENOMEM 12
-#endif
-
-#
-
-#ifndef VA_COPY
-#  ifdef HAVE_VA_COPY
-#    define VA_COPY(dest, src) va_copy(dest, src)
-#  else
-#    ifdef HAVE___VA_COPY
-#      define VA_COPY(dest, src) __va_copy(dest, src)
-#    else
-#      define VA_COPY(dest, src) (dest) = (src)
-#    endif
-#  endif
-#endif
-
-
-static inline int vasprintf(char **str, const char *fmt, va_list ap)
-{
-        int ret = -1;
-        va_list ap2;
-        char *string, *newstr;
-        size_t len;
-
-        VA_COPY(ap2, ap);
-        if ((string = (char*)malloc(INIT_SZ)) == NULL)
-                goto fail;
-
-        ret = vsnprintf(string, INIT_SZ, fmt, ap2);
-        if (ret >= 0 && ret < INIT_SZ) { /* succeeded with initial alloc */
-                *str = string;
-        } else if (ret == INT_MAX || ret < 0) { /* Bad length */
-                goto fail;
-        } else {        /* bigger than initial, realloc allowing for nul */
-                len = (size_t)ret + 1;
-                if ((newstr = (char*)realloc(string, len)) == NULL) {
-                        free(string);
-                        goto fail;
-                } else {
-                        va_end(ap2);
-                        VA_COPY(ap2, ap);
-                        ret = vsnprintf(newstr, len, fmt, ap2);
-                        if (ret >= 0 && (size_t)ret < len) {
-                                *str = newstr;
-                        } else { /* failed with realloc'ed string, give up */
-                                free(newstr);
-                                goto fail;
-                        }
-                }
-        }
-        va_end(ap2);
-        return (ret);
-
-fail:
-        *str = NULL;
-        errno = ENOMEM;
-        va_end(ap2);
-        return (-1);
-}
-static inline int asprintf(char **str, const char *fmt, ...)
-{
-        va_list ap;
-        int ret;
-
-        *str = NULL;
-        va_start(ap, fmt);
-        ret = vasprintf(str, fmt, ap);
-        va_end(ap);
-
-        return ret;
-}
diff --git a/cext/src/include/ruby/ruby.h b/cext/src/include/ruby/ruby.h
index cd1436817dc..69273d8cf3c 100644
--- a/cext/src/include/ruby/ruby.h
+++ b/cext/src/include/ruby/ruby.h
@@ -35,20 +35,12 @@
 // Some platform specific includes
 #if defined(__WIN32__) || defined(__MINGW32__)
 #   include "jruby_win32.h"
-#   include "asprintf.h"
 #else
 #   define RUBY_DLLSPEC
 #       include <sys/select.h>
 #       include <pthread.h>
 #endif
 
-#if defined (__SVR4) && defined (__sun)
-#   define HAVE_VA_COPY
-#   ifndef asprintf
-#     include "asprintf.h"
-#   endif
-#endif
-
 #ifdef RUBY_EXTCONF_H
 #include RUBY_EXTCONF_H
 #endif
diff --git a/cext/src/object.cpp b/cext/src/object.cpp
index 5b3d1c7b281..a60c78da70a 100644
--- a/cext/src/object.cpp
+++ b/cext/src/object.cpp
@@ -19,7 +19,8 @@
  * version 3 along with this work.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-
+#include <stdio.h>
+#include <stdlib.h>
 #include "jruby.h"
 #include "ruby.h"
 #include "JLocalEnv.h"
@@ -270,16 +271,14 @@ extern "C" VALUE
 rb_any_to_s(VALUE obj)
 {
     char* buf;
+    int len = 128, buflen;
 
-    if (asprintf(&buf, "#<%s:%p>", rb_obj_classname(obj), (void *) obj) == -1) {
-        // Could not allocate
-        return rb_str_new("", 0);
-    }
-
-    VALUE result = rb_str_new_cstr(buf);
-    free(buf);
+    do {
+	buf = (char *) alloca(buflen = len);
+        len = snprintf(buf, buflen, "#<%s:%p>", rb_obj_classname(obj), (void *) obj);
+    } while (len >= buflen);
 
-    return result;
+    return rb_str_new_cstr(buf);
 }
 
 extern "C" void