diff --git a/src/metric.cpp b/src/metric.cpp
index f36e8e1..3a870c9 100644
--- a/src/metric.cpp
+++ b/src/metric.cpp
@@ -1448,8 +1448,8 @@ update_histogram_buckets_simd(std::span<const double> thresholds,
 #elif defined(__aarch64__)
 static void
 update_histogram_buckets_simd(std::span<const double> thresholds,
-                                std::span<uint64_t> counts, double x,
-                                size_t start_idx) {
+                              std::span<uint64_t> counts, double x,
+                              size_t start_idx) {
   const size_t size = thresholds.size();
   size_t i = start_idx;