diff --git a/test/src/unit-tile-metadata.cc b/test/src/unit-tile-metadata.cc
index f5853379ce0d..27de153ba0d9 100644
--- a/test/src/unit-tile-metadata.cc
+++ b/test/src/unit-tile-metadata.cc
@@ -1554,7 +1554,9 @@ struct CPPTileMetadataStringDimFx {
       // Validate mins.
       auto& min = frag_meta[0]->get_min("a");
       CHECK(min.size() == sizeof(double));
-      CHECK(*static_cast<double*>(static_cast<void*>(min.data())) == 4);
+      CHECK(
+          *static_cast<const double*>(static_cast<const void*>(min.data())) ==
+          4);
 
       CHECK_THROWS_WITH(
           frag_meta[0]->get_min("d1"),
@@ -1569,7 +1571,9 @@ struct CPPTileMetadataStringDimFx {
       // Validate maxs.
       auto& max = frag_meta[0]->get_max("a");
       CHECK(max.size() == sizeof(double));
-      CHECK(*static_cast<double*>(static_cast<void*>(max.data())) == 7);
+      CHECK(
+          *static_cast<const double*>(static_cast<const void*>(max.data())) ==
+          7);
 
       CHECK_THROWS_WITH(
           frag_meta[0]->get_max("d1"),
diff --git a/tiledb/sm/serialization/capnp_utils.h b/tiledb/sm/serialization/capnp_utils.h
index efc58528eac6..2e6e8f78cfc1 100644
--- a/tiledb/sm/serialization/capnp_utils.h
+++ b/tiledb/sm/serialization/capnp_utils.h
@@ -35,6 +35,7 @@
 
 #ifdef TILEDB_SERIALIZATION
 
+#include <capnp/compat/std-iterator.h>
 #include "tiledb-rest.capnp.h"
 
 #include "tiledb/common/heap_memory.h"