diff --git a/panda/src/particlesystem/zSpinParticle.h b/panda/src/particlesystem/zSpinParticle.h
index 6372bcc3e8..632295b386 100644
--- a/panda/src/particlesystem/zSpinParticle.h
+++ b/panda/src/particlesystem/zSpinParticle.h
@@ -33,7 +33,7 @@ public:
   virtual void update(void);
   virtual void die(void);
 
-  virtual float get_angle(void) const;
+  virtual float get_theta(void) const;
 
   INLINE void set_initial_angle(float t);
   INLINE float get_initial_angle(void) const;