diff --git a/desktop-shell/shell.c b/desktop-shell/shell.c
index 48bee34..dec9169 100644
--- a/desktop-shell/shell.c
+++ b/desktop-shell/shell.c
@@ -4808,7 +4808,7 @@
 			if (!output->zoom.active) {
 				if (output->zoom.level <= 0.0)
 					continue;
-				weston_output_activate_zoom(output);
+				weston_output_activate_zoom(output, seat);
 			}
 
 			output->zoom.spring_z.target = output->zoom.level;