diff --git a/Processes/UrQMD/UrQMD.cc b/Processes/UrQMD/UrQMD.cc
index b60edba1b5fdc636723c70cbfcee76e92281af4f..3efe905e31d6dff486d4048fd358733b6fd30403 100644
--- a/Processes/UrQMD/UrQMD.cc
+++ b/Processes/UrQMD/UrQMD.cc
@@ -245,6 +245,8 @@ std::pair<int, int> corsika::process::UrQMD::ConvertToUrQMD(
       {-311, {-106, 1}},   // K0bar
       {2212, {1, 1}},      // p
       {2112, {1, -1}},     // n
+      {-2212, {-1, -1}},   // pbar
+      {-2112, {-1, 1}},    // nbar
       {221, {102, 0}},     // eta
       {213, {104, 2}},     // rho+
       {-213, {104, -2}},   // rho-