diff --git a/cpp/src/arrow/compute/kernels/hash_aggregate_test.cc b/cpp/src/arrow/compute/kernels/hash_aggregate_test.cc
index 4e2a5033018e7..e010685443dae 100644
--- a/cpp/src/arrow/compute/kernels/hash_aggregate_test.cc
+++ b/cpp/src/arrow/compute/kernels/hash_aggregate_test.cc
@@ -189,13 +189,19 @@ struct TestGrouper {
     int64_t num_ids = left->length();
     auto left_data = left->data();
     auto right_data = right->data();
-    const uint32_t* left_ids = reinterpret_cast<const uint32_t*>(left_data->buffers[1]->data());
-    const uint32_t* right_ids = reinterpret_cast<const uint32_t*>(right_data->buffers[1]->data());
+    const uint32_t* left_ids =
+        reinterpret_cast<const uint32_t*>(left_data->buffers[1]->data());
+    const uint32_t* right_ids =
+        reinterpret_cast<const uint32_t*>(right_data->buffers[1]->data());
     uint32_t max_left_id = 0;
     uint32_t max_right_id = 0;
     for (int64_t i = 0; i < num_ids; ++i) {
-      if (left_ids[i] > max_left_id) { max_left_id = left_ids[i]; }
-      if (right_ids[i] > max_right_id) { max_right_id = right_ids[i]; }
+      if (left_ids[i] > max_left_id) {
+        max_left_id = left_ids[i];
+      }
+      if (right_ids[i] > max_right_id) {
+        max_right_id = right_ids[i];
+      }
     }
     std::vector<bool> right_to_left_present;
     std::vector<bool> left_to_right_present;
diff --git a/cpp/src/arrow/exec/groupby_storage.h b/cpp/src/arrow/exec/groupby_storage.h
index c154d7654ba7d..0dd04a062b9ed 100644
--- a/cpp/src/arrow/exec/groupby_storage.h
+++ b/cpp/src/arrow/exec/groupby_storage.h
@@ -19,11 +19,11 @@
 
 #include <cstdint>
 
+#include "arrow/exec/common.h"
+#include "arrow/exec/util.h"
 #include "arrow/memory_pool.h"
 #include "arrow/result.h"
 #include "arrow/status.h"
-#include "arrow/exec/common.h"
-#include "arrow/exec/util.h"
 
 #define AGGREGATES_STORED_SEPARATELY