diff --git a/bytes.cc b/bytes.cc
index 1f2197a2f9..5dccd34ffd 100644
--- a/bytes.cc
+++ b/bytes.cc
@@ -7,6 +7,7 @@
  */
 
 #include "bytes.hh"
+#include <fmt/ostream.h>
 #include <seastar/core/print.hh>
 
 static inline int8_t hex_to_int(unsigned char c) {
diff --git a/utils/estimated_histogram.hh b/utils/estimated_histogram.hh
index e6eefb0049..de1919b006 100644
--- a/utils/estimated_histogram.hh
+++ b/utils/estimated_histogram.hh
@@ -15,6 +15,7 @@
 #include <algorithm>
 #include <vector>
 #include <chrono>
+#include <fmt/ostream.h>
 #include <seastar/core/metrics_types.hh>
 #include <seastar/core/print.hh>
 #include "seastarx.hh"
diff --git a/utils/rjson.hh b/utils/rjson.hh
index 2b5a6f0a6e..b78eea6b4e 100644
--- a/utils/rjson.hh
+++ b/utils/rjson.hh
@@ -26,6 +26,7 @@
  * or calling Size() on a non-array value.
  */
 
+#include <iostream>
 #include <string>
 #include <string_view>
 #include <type_traits>
diff --git a/utils/uuid.cc b/utils/uuid.cc
index ce38835c15..55f46033f5 100644
--- a/utils/uuid.cc
+++ b/utils/uuid.cc
@@ -13,6 +13,7 @@
 #include <boost/iterator/function_input_iterator.hpp>
 #include <boost/algorithm/string.hpp>
 #include <string>
+#include <fmt/ostream.h>
 #include <seastar/core/sstring.hh>
 #include "marshal_exception.hh"