diff --git a/source/blender/modifiers/intern/MOD_nodes.cc b/source/blender/modifiers/intern/MOD_nodes.cc
index 57de629fc18..e71662e9ccf 100644
--- a/source/blender/modifiers/intern/MOD_nodes.cc
+++ b/source/blender/modifiers/intern/MOD_nodes.cc
@@ -1090,12 +1090,14 @@ static Vector<SpaceSpreadsheet *> find_spreadsheet_editors(Main *bmain)
 {
   Vector<SpaceSpreadsheet *> spreadsheets;
   wmWindowManager *wm = (wmWindowManager *)bmain->wm.first;
-  LISTBASE_FOREACH (wmWindow *, window, &wm->windows) {
-    bScreen *screen = BKE_workspace_active_screen_get(window->workspace_hook);
-    LISTBASE_FOREACH (ScrArea *, area, &screen->areabase) {
-      SpaceLink *sl = (SpaceLink *)area->spacedata.first;
-      if (sl->spacetype == SPACE_SPREADSHEET) {
-        spreadsheets.append((SpaceSpreadsheet *)sl);
+  if (wm != nullptr) {
+    LISTBASE_FOREACH (wmWindow *, window, &wm->windows) {
+      bScreen *screen = BKE_workspace_active_screen_get(window->workspace_hook);
+      LISTBASE_FOREACH (ScrArea *, area, &screen->areabase) {
+        SpaceLink *sl = (SpaceLink *)area->spacedata.first;
+        if (sl->spacetype == SPACE_SPREADSHEET) {
+          spreadsheets.append((SpaceSpreadsheet *)sl);
+        }
       }
     }
   }