diff --git a/direct/src/particles/ParticleEffect.py b/direct/src/particles/ParticleEffect.py
index 054777f3e3..96f544d1d4 100644
--- a/direct/src/particles/ParticleEffect.py
+++ b/direct/src/particles/ParticleEffect.py
@@ -2,6 +2,7 @@
 from panda3d.core import Filename, NodePath, VirtualFileSystem, getModelPath
 
 # Leave these imports in, they may be used by ptf files.
+from panda3d.core import * # pylint: disable=unused-import
 from panda3d.physics import * # pylint: disable=unused-import
 from . import Particles # pylint: disable=unused-import
 from . import ForceGroup # pylint: disable=unused-import