diff --git a/cpp/src/neighbors/detail/ann_utils.cuh b/cpp/src/neighbors/detail/ann_utils.cuh
index fa0e2a9217..2d33c10190 100644
--- a/cpp/src/neighbors/detail/ann_utils.cuh
+++ b/cpp/src/neighbors/detail/ann_utils.cuh
@@ -148,7 +148,7 @@ struct config<float> {
 };
 template <>
 struct config<half> {
-  using value_t                    = half;
+  using value_t                    = float;
   static constexpr double kDivisor = 1.0;
 };
 template <>
diff --git a/cpp/src/neighbors/ivf_flat/ivf_flat_interleaved_scan.cuh b/cpp/src/neighbors/ivf_flat/ivf_flat_interleaved_scan.cuh
index 9bf4ae6784..f097767c1a 100644
--- a/cpp/src/neighbors/ivf_flat/ivf_flat_interleaved_scan.cuh
+++ b/cpp/src/neighbors/ivf_flat/ivf_flat_interleaved_scan.cuh
@@ -138,8 +138,8 @@ struct loadAndComputeDist {
       for (int k = 0; k < Veclen; ++k) {
         compute_dist(dist, queryRegs[k], encV[k]);
         if constexpr (ComputeNorm) {
-          norm_query += queryRegs[k] * queryRegs[k];
-          norm_data += encV[k] * encV[k];
+          norm_query += (AccT)(queryRegs[k] * queryRegs[k]);
+          norm_data += (AccT)(encV[k] * encV[k]);
         }
       }
     }
@@ -173,8 +173,8 @@ struct loadAndComputeDist {
           T q = raft::shfl(queryReg, d + k, raft::WarpSize);
           compute_dist(dist, q, encV[k]);
           if constexpr (ComputeNorm) {
-            norm_query += q * q;
-            norm_data += encV[k] * encV[k];
+            norm_query += (AccT)(q * q);
+            norm_data += (AccT)(encV[k] * encV[k]);
           }
         }
       }
@@ -199,8 +199,8 @@ struct loadAndComputeDist {
         T q = raft::shfl(queryReg, d + k, raft::WarpSize);
         compute_dist(dist, q, enc[k]);
         if constexpr (ComputeNorm) {
-          norm_query += q * q;
-          norm_data += enc[k] * enc[k];
+          norm_query += (AccT)(q * q);
+          norm_data += (AccT)(enc[k] * enc[k]);
         }
       }
     }