ext/jpeg/jpeg_image.c in jpeg-0.7.0 vs ext/jpeg/jpeg_image.c in jpeg-0.7.1

@@ -72,10 +72,10 @@
             rb_raise(rb_eJpegError, "Open file failed: %s", p_jpeg->filename);
         }
 
     } else {
 
-#ifdef jpeg_mem_src
+#if JPEG_LIB_VERSION >= 80
         jpeg_mem_src(p_jpeg->read, (unsigned char *) p_jpeg->buffer, p_jpeg->buffer_len);
 #else
         if ((p_jpeg->fp = fmemopen(p_jpeg->buffer, p_jpeg->buffer_len, "rb")) == NULL) {
             rb_raise(rb_eJpegError, "Could not read jpeg from buffer");
         }