diff --git a/degesch.c b/degesch.c
index 30fa19b..5908cfe 100644
--- a/degesch.c
+++ b/degesch.c
@@ -12858,8 +12858,9 @@ on_move_buffer_left (int count, int key, void *user_data)
 	struct app_context *ctx = user_data;
 	int total = buffer_count (ctx);
 	int n = buffer_get_index (ctx, ctx->current_buffer) - count;
-	if (n <= 0)  n += total * (1 + -n / total);
-	buffer_move (ctx, ctx->current_buffer, (n - 1) % total + 1);
+	buffer_move (ctx, ctx->current_buffer, n <= 0
+		? (total + n % total)
+		: ((n - 1) % total + 1));
 	return true;
 }