diff --git a/src/compiler/nir/nir_print.c b/src/compiler/nir/nir_print.c
index edc83db5989..a3e12074e68 100644
--- a/src/compiler/nir/nir_print.c
+++ b/src/compiler/nir/nir_print.c
@@ -1553,6 +1553,17 @@ print_if(nir_if *if_stmt, print_state *state, unsigned tabs)
    print_tabs(tabs, fp);
    fprintf(fp, "if ");
    print_src(&if_stmt->condition, state);
+   switch (if_stmt->control) {
+   case nir_selection_control_flatten:
+      fprintf(fp, " /* flatten */");
+      break;
+   case nir_selection_control_dont_flatten:
+      fprintf(fp, " /* don't flatten */");
+      break;
+   case nir_selection_control_none:
+   default:
+      break;
+   }
    fprintf(fp, " {\n");
    foreach_list_typed(nir_cf_node, node, node, &if_stmt->then_list) {
       print_cf_node(node, state, tabs + 1);