diff --git a/libopenjpeg/cio.h b/libopenjpeg/cio.h
index c75a4653..e24f77d1 100644
--- a/libopenjpeg/cio.h
+++ b/libopenjpeg/cio.h
@@ -94,4 +94,14 @@ unsigned int cio_read(int n);
  */
 void cio_skip(int n);
 
+/*
+ * Read n bytes, copy to buffer
+ */
+void cio_read_to_buf(unsigned char* buf, int n);/* Glenn Pearson adds */
+
+/*
+ * Write n bytes, copy from buffer
+ */
+void cio_write_from_buf(unsigned char* buf, int n);/* Glenn Pearson adds */
+
 #endif