diff --git a/main/php_streams.h b/main/php_streams.h
index 5e1aa4f63be..5cc78aa4bf2 100755
--- a/main/php_streams.h
+++ b/main/php_streams.h
@@ -462,12 +462,6 @@ END_EXTERN_C()
 #define PHP_STREAM_CAST_MASK		(PHP_STREAM_CAST_TRY_HARD | PHP_STREAM_CAST_RELEASE | PHP_STREAM_CAST_INTERNAL)
 BEGIN_EXTERN_C()
 PHPAPI int _php_stream_cast(php_stream *stream, int castas, void **ret, int show_err TSRMLS_DC);
-/* This functions transforms the first char to 'w' if it's not 'r', 'a' or 'w'
- * and strips any subsequent chars except '+' and 'b'.
- * Use this to sanitize stream->mode if you call e.g. fdopen, fopencookie or
- * any other function that expects standard modes and you allow non-standard
- * ones. result should be a char[5]. */
-PHPAPI void php_stream_rep_nonstand_mode(php_stream *stream, char *result);
 END_EXTERN_C()
 /* use this to check if a stream can be cast into another form */
 #define php_stream_can_cast(stream, as)	_php_stream_cast((stream), (as), NULL, 0 TSRMLS_CC)
diff --git a/main/streams/cast.c b/main/streams/cast.c
index 89bfa0ab46a..d3be31b22e2 100644
--- a/main/streams/cast.c
+++ b/main/streams/cast.c
@@ -144,9 +144,9 @@ static COOKIE_IO_FUNCTIONS_T stream_cookie_functions =
 #endif
 /* }}} */
 
-/* {{{ php_stream_rep_nonstand_mode
+/* {{{ php_stream_mode_sanitize_fdopen_fopencookie
  * Result should have at least size 5, e.g. to write wbx+\0 */
-PHPAPI void php_stream_rep_nonstand_mode(php_stream *stream, char *result)
+void php_stream_mode_sanitize_fdopen_fopencookie(php_stream *stream, char *result)
 {
 	/* replace modes not supported by fdopen and fopencookie, but supported 
 	 * by PHP's fread(), so that their calls won't fail */
@@ -233,7 +233,7 @@ PHPAPI int _php_stream_cast(php_stream *stream, int castas, void **ret, int show
 
 		{
 			char fixed_mode[5];
-			php_stream_rep_nonstand_mode(stream, fixed_mode);
+			php_stream_mode_sanitize_fdopen_fopencookie(stream, fixed_mode);
 			*(FILE**)ret = fopencookie(stream, fixed_mode, PHP_STREAM_COOKIE_FUNCTIONS);
 		}
 
diff --git a/main/streams/php_streams_int.h b/main/streams/php_streams_int.h
index 273d85eefb1..b0242c88845 100644
--- a/main/streams/php_streams_int.h
+++ b/main/streams/php_streams_int.h
@@ -59,6 +59,13 @@
 #define S_ISREG(mode)	(((mode)&S_IFMT) == S_IFREG)
 #endif
 
+/* This functions transforms the first char to 'w' if it's not 'r', 'a' or 'w'
+ * and strips any subsequent chars except '+' and 'b'.
+ * Use this to sanitize stream->mode if you call e.g. fdopen, fopencookie or
+ * any other function that expects standard modes and you allow non-standard
+ * ones. result should be a char[5]. */
+void php_stream_mode_sanitize_fdopen_fopencookie(php_stream *stream, char *result);
+
 void php_stream_tidy_wrapper_error_log(php_stream_wrapper *wrapper TSRMLS_DC);
 void php_stream_display_wrapper_errors(php_stream_wrapper *wrapper, const char *path, const char *caption TSRMLS_DC);
 
diff --git a/main/streams/plain_wrapper.c b/main/streams/plain_wrapper.c
index a3cb1b28d37..a23603a6403 100644
--- a/main/streams/plain_wrapper.c
+++ b/main/streams/plain_wrapper.c
@@ -491,7 +491,7 @@ static int php_stdiop_cast(php_stream *stream, int castas, void **ret TSRMLS_DC)
 					/* we were opened as a plain file descriptor, so we
 					 * need fdopen now */
 					char fixed_mode[5];
-					php_stream_rep_nonstand_mode(stream, fixed_mode);
+					php_stream_mode_sanitize_fdopen_fopencookie(stream, fixed_mode);
 					data->file = fdopen(data->fd, fixed_mode);
 					if (data->file == NULL) {
 						return FAILURE;