diff --git a/src/map.c b/src/map.c
index 451fad6..3fb84ac 100644
--- a/src/map.c
+++ b/src/map.c
@@ -164,7 +164,7 @@
 	return 1;
 }
 
-static int sample_conv_map(struct session *session, const struct arg *arg_p,
+static int sample_conv_map(struct stream *stream, const struct arg *arg_p,
                            struct sample *smp, void *private)
 {
 	struct map_descriptor *desc;