diff --git a/Src/Base/AMReX_Scan.H b/Src/Base/AMReX_Scan.H
index 11fdfd8bd70..4ed44c8c749 100644
--- a/Src/Base/AMReX_Scan.H
+++ b/Src/Base/AMReX_Scan.H
@@ -400,7 +400,7 @@ T PrefixSum (N n, FIN && fin, FOUT && fout, TYPE type, RetSum a_ret_sum = retSum
 
 #ifndef AMREX_SYCL_NO_MULTIPASS_SCAN
     if (nblocks > 1) {
-        return PrefixSum_mp<T>(n, std::forward<FIN>(fin), std::forward<FOUT>(fout), type, retSum);
+        return PrefixSum_mp<T>(n, std::forward<FIN>(fin), std::forward<FOUT>(fout), type, a_ret_sum);
     }
 #endif