diff --git a/epoch2/cuda/ee_mumu/SubProcesses/P1_Sigma_sm_epem_mupmum/CPPProcess.cc b/epoch2/cuda/ee_mumu/SubProcesses/P1_Sigma_sm_epem_mupmum/CPPProcess.cc
index c66ea3dfd1..da10fa0791 100644
--- a/epoch2/cuda/ee_mumu/SubProcesses/P1_Sigma_sm_epem_mupmum/CPPProcess.cc
+++ b/epoch2/cuda/ee_mumu/SubProcesses/P1_Sigma_sm_epem_mupmum/CPPProcess.cc
@@ -229,6 +229,28 @@ bool * isGoodHel)  // output: isGoodHel[ncomb] - device array
 
 //--------------------------------------------------------------------------
 
+  // Retrieve the compiler that was used to build this module
+  const std::string CPPProcess::getCompiler()
+  {
+    std::stringstream out;
+#ifdef __CUDACC__
+#if defined __CUDACC_VER_MAJOR__ && defined __CUDACC_VER_MINOR__ && defined __CUDACC_VER_BUILD__
+    out << "nvcc " << __CUDACC_VER_MAJOR__ << "." << __CUDACC_VER_MINOR__ << "." << __CUDACC_VER_BUILD__;
+#else
+    out << "nvcc UNKNOWN";
+#endif
+#else
+#if defined __GNUC__ && defined __GNUC_MINOR__ && defined __GNUC_PATCHLEVEL__
+    out << "gcc (GCC) " << __GNUC__ << "." << __GNUC_MINOR__ << "." << __GNUC_PATCHLEVEL__;
+#else
+    out << "gcc UNKNOWKN";
+#endif
+#endif
+    return out.str();
+  }
+
+  //--------------------------------------------------------------------------
+
 #ifdef __CUDACC__
 void sigmaKin_setGoodHel(const bool * isGoodHel)  // input: isGoodHel[ncomb] - host array
 {
diff --git a/epoch2/cuda/ee_mumu/SubProcesses/P1_Sigma_sm_epem_mupmum/CPPProcess.h b/epoch2/cuda/ee_mumu/SubProcesses/P1_Sigma_sm_epem_mupmum/CPPProcess.h
index 5776cfb7f5..7734ca9a0c 100644
--- a/epoch2/cuda/ee_mumu/SubProcesses/P1_Sigma_sm_epem_mupmum/CPPProcess.h
+++ b/epoch2/cuda/ee_mumu/SubProcesses/P1_Sigma_sm_epem_mupmum/CPPProcess.h
@@ -87,6 +87,9 @@ class CPPProcess
     static const int nexternal = mgOnGpu::npar; 
     // static const int nprocesses = 1;
 
+    // Retrieve the compiler that was used to build this module
+    static const std::string getCompiler();
+
   private:
     int m_numiterations; 
     // gpu variables
diff --git a/epoch2/cuda/ee_mumu/SubProcesses/P1_Sigma_sm_epem_mupmum/check.cc b/epoch2/cuda/ee_mumu/SubProcesses/P1_Sigma_sm_epem_mupmum/check.cc
index ce735e143b..137ada289f 100644
--- a/epoch2/cuda/ee_mumu/SubProcesses/P1_Sigma_sm_epem_mupmum/check.cc
+++ b/epoch2/cuda/ee_mumu/SubProcesses/P1_Sigma_sm_epem_mupmum/check.cc
@@ -645,7 +645,7 @@ int main(int argc, char **argv)
 #endif
               << "OMP threads / `nproc --all` = " << omp_get_max_threads() << " / " << nprocall // includes a newline
 #endif
-      //<< "MatrixElements compiler     = " << process.getCompiler() << std::endl
+              << "MatrixElements compiler     = " << process.getCompiler() << std::endl
               << "-----------------------------------------------------------------------" << std::endl
               << "NumberOfEntries             = " << niter << std::endl
               << std::scientific // fixed format: affects all floats (default precision: 6)