diff --git a/python/_cosmo_power.pyx b/python/_cosmo_power.pyx
index 7889d17..78305f8 100644
--- a/python/_cosmo_power.pyx
+++ b/python/_cosmo_power.pyx
@@ -39,6 +39,9 @@ cdef extern from "cosmopower.hpp" namespace "CosmoTool":
     double OmegaEff
     double Gamma0
     double normPower
+    double A_BAO
+    double r_BAO
+    double k_D_BAO
     
         
     CosmoPower()