1 files changed, 3 insertions, 0 deletions

diff --git a/swaylock/render.c b/swaylock/render.c
index cc40f4e9..05236dea 100644
--- a/swaylock/render.c
+++ b/swaylock/render.c
@@ -17,6 +17,9 @@ void render_frame(struct swaylock_surface *surface) {
 
         int buffer_width = surface->width * surface->scale;
         int buffer_height = surface->height * surface->scale;
+        if (buffer_width == 0 || buffer_height == 0) {
+                return; // not yet configured
+        }
 
         surface->current_buffer = get_next_buffer(state->shm,
                         surface->buffers, buffer_width, buffer_height);