diff --git a/session.c b/session.c
index 160d13fb..1cf4170e 100644
--- a/session.c
+++ b/session.c
@@ -354,7 +354,7 @@ SR_API int sr_session_start(void)
 		sdi = l->data;
 		if ((ret = sdi->driver->dev_acquisition_start(sdi, sdi)) != SR_OK) {
 			sr_err("%s: could not start an acquisition "
-			       "(%d)", __func__, ret);
+			       "(%s)", __func__, sr_strerror(ret));
 			break;
 		}
 	}