diff --git a/unity/Runtime/Bindings/MujocoBindings.cs b/unity/Runtime/Bindings/MujocoBindings.cs
index 44cc3115..1c34567f 100644
--- a/unity/Runtime/Bindings/MujocoBindings.cs
+++ b/unity/Runtime/Bindings/MujocoBindings.cs
@@ -3351,6 +3351,9 @@ public static unsafe extern void mju_mulMatVec(double* res, double* mat, double*
 [DllImport("mujoco", CallingConvention = CallingConvention.Cdecl)]
 public static unsafe extern void mju_mulMatTVec(double* res, double* mat, double* vec, int nr, int nc);
 
+[DllImport("mujoco", CallingConvention = CallingConvention.Cdecl)]
+public static unsafe extern double mju_mulVecMatVec(double* vec1, double* mat, double* vec2, int n);
+
 [DllImport("mujoco", CallingConvention = CallingConvention.Cdecl)]
 public static unsafe extern void mju_transpose(double* res, double* mat, int nr, int nc);