diff --git a/common/placer1.cc b/common/placer1.cc
index 1d00e77a..51ef271a 100644
--- a/common/placer1.cc
+++ b/common/placer1.cc
@@ -236,7 +236,10 @@ class SAPlacer
                 temp = post_legalise_temp;
                 diameter *= post_legalise_dia_scale;
                 ctx->shuffle(autoplaced);
-                assign_budget(ctx);
+
+                // Legalisation is a big change so force a slack redistribution here
+                if (ctx->slack_redist_iter > 0)
+                    assign_budget(ctx, true /* quiet */);
             } else if (ctx->slack_redist_iter > 0 && iter % ctx->slack_redist_iter == 0) {
                 assign_budget(ctx, true /* quiet */);
             }