diff --git a/main/streams/plain_wrapper.c b/main/streams/plain_wrapper.c
index 919382aa3c6..daeea46753b 100644
--- a/main/streams/plain_wrapper.c
+++ b/main/streams/plain_wrapper.c
@@ -211,7 +211,7 @@ PHPAPI php_stream *_php_stream_fopen_from_fd(int fd, const char *mode, const cha
 #ifdef ESPIPE
 			if (stream->position == (off_t)-1 && errno == ESPIPE) {
 				stream->position = 0;
-				stream->is_pipe = 1;
+				self->is_pipe = 1;
 			}
 #endif
 		}