diff --git a/CHANGES b/CHANGES
index a3cf960a..4c84c923 100644
--- a/CHANGES
+++ b/CHANGES
@@ -1,5 +1,8 @@
 CHANGES FROM 2.4 to 2.5 09 May 2017
 
+* Reset updated flag when restarting #() command so that new output is properly
+  recognised. GitHub issue 922.
+
 * Fix ECH with a background colour.
 
 * Do not rely on the terminal not moving the cursor after DL or EL.
@@ -12,7 +15,7 @@ CHANGES FROM 2.4 to 2.5 09 May 2017
 * Add pane_mode format.
 
 * Differentiate M-Up from Escape+Up when possible (that is, in terminals with
-  xterm(1) style functions keys). GitHub issue 907.
+  xterm(1) style function keys). GitHub issue 907.
 
 * Add session_stack and window_stack_index formats.
 
diff --git a/format.c b/format.c
index ddc5a7a5..35d8ee28 100644
--- a/format.c
+++ b/format.c
@@ -320,6 +320,7 @@ format_job_get(struct format_tree *ft, const char *cmd)
 			xasprintf(&fj->out, "<'%s' didn't start>", fj->cmd);
 		}
 		fj->last = t;
+		fj->updated = 0;
 	}
 
 	if (ft->flags & FORMAT_STATUS)