diff --git a/src/llama-quant.cpp b/src/llama-quant.cpp
index 9fbc908c16..48c6fe7c15 100644
--- a/src/llama-quant.cpp
+++ b/src/llama-quant.cpp
@@ -1091,17 +1091,18 @@ static std::unordered_map<std::string, ggml_type> target_bpw_type(
                         }
                     }
 
-                    // Cosine Distance
-                    double cos_sim;
-                    const double norm_prod = nx * ny;
+                    // Concordance correlation coefficient (magnitude-Aware WCE)
+                    double ccc;
+                    const double norm_sum = nx + ny;
 
-                    if (norm_prod <= EPSILON) { cos_sim = nx <= EPSILON && ny <= EPSILON ? 1.0 : 0.0; }
-                    else { cos_sim = dot / std::sqrt(norm_prod); }
+                    if (norm_sum <= EPSILON) { ccc = nx <= EPSILON && ny <= EPSILON ? 1.0 : 0.0; }
+                    else { ccc = 2.0 * dot / norm_sum; }
 
-                    if (cos_sim > 1.0) { cos_sim = 1.0; }
-                    else if (cos_sim < -1.0) { cos_sim = -1.0; }
 
-                    slice_sum += 1.0 - cos_sim;
+                    if (ccc > 1.0) { ccc = 1.0; }
+                    else if (ccc < -1.0) { ccc = -1.0; }
+
+                    slice_sum += 1.0 - ccc;
                     off += (size_t) n_per_row;
                 }