diff --git a/gdb/cli-out.c b/gdb/cli-out.c
index 55c8d2b3b1b..8d6b426203f 100644
--- a/gdb/cli-out.c
+++ b/gdb/cli-out.c
@@ -105,6 +105,19 @@ cli_ui_out::do_field_int (int fldno, int width, ui_align alignment,
 		   ui_out_style_kind::DEFAULT);
 }
 
+/* output an unsigned field */
+
+void
+cli_ui_out::do_field_unsigned (int fldno, int width, ui_align alignment,
+			       const char *fldname, ULONGEST value)
+{
+  if (m_suppress_output)
+    return;
+
+  do_field_string (fldno, width, alignment, fldname, pulongest (value),
+		   ui_out_style_kind::DEFAULT);
+}
+
 /* used to omit a field */
 
 void
diff --git a/gdb/cli-out.h b/gdb/cli-out.h
index eeb555fbbec..fd1d6274a9f 100644
--- a/gdb/cli-out.h
+++ b/gdb/cli-out.h
@@ -47,6 +47,9 @@ protected:
   virtual void do_end (ui_out_type type) override;
   virtual void do_field_int (int fldno, int width, ui_align align,
 			     const char *fldname, int value) override;
+  virtual void do_field_unsigned (int fldno, int width, ui_align align,
+				  const char *fldname, ULONGEST value)
+    override;
   virtual void do_field_skip (int fldno, int width, ui_align align,
 			      const char *fldname) override;
   virtual void do_field_string (int fldno, int width, ui_align align,
diff --git a/gdb/disasm.c b/gdb/disasm.c
index 4e58cb67f93..927b092ce2c 100644
--- a/gdb/disasm.c
+++ b/gdb/disasm.c
@@ -209,7 +209,7 @@ gdb_pretty_print_disassembler::pretty_print_insn (struct ui_out *uiout,
 
     if (insn->number != 0)
       {
-	uiout->field_fmt ("insn-number", "%u", insn->number);
+	uiout->field_unsigned ("insn-number", insn->number);
 	uiout->text ("\t");
       }
 
diff --git a/gdb/mi/mi-out.c b/gdb/mi/mi-out.c
index d8bee0f3927..dd99a2b7fb1 100644
--- a/gdb/mi/mi-out.c
+++ b/gdb/mi/mi-out.c
@@ -105,6 +105,16 @@ mi_ui_out::do_field_int (int fldno, int width, ui_align alignment,
 		   ui_out_style_kind::DEFAULT);
 }
 
+/* Output an unsigned field.  */
+
+void
+mi_ui_out::do_field_unsigned (int fldno, int width, ui_align alignment,
+			      const char *fldname, ULONGEST value)
+{
+  do_field_string (fldno, width, alignment, fldname, pulongest (value),
+		   ui_out_style_kind::DEFAULT);
+}
+
 /* Used to omit a field.  */
 
 void
diff --git a/gdb/mi/mi-out.h b/gdb/mi/mi-out.h
index 82f77592da8..1328684ed2b 100644
--- a/gdb/mi/mi-out.h
+++ b/gdb/mi/mi-out.h
@@ -54,6 +54,9 @@ protected:
   virtual void do_end (ui_out_type type) override;
   virtual void do_field_int (int fldno, int width, ui_align align,
 			  const char *fldname, int value) override;
+  virtual void do_field_unsigned (int fldno, int width, ui_align align,
+				  const char *fldname, ULONGEST value)
+    override;
   virtual void do_field_skip (int fldno, int width, ui_align align,
 			   const char *fldname) override;
   virtual void do_field_string (int fldno, int width, ui_align align,
diff --git a/gdb/record-btrace.c b/gdb/record-btrace.c
index 21085d5c62c..313f1ac7d1e 100644
--- a/gdb/record-btrace.c
+++ b/gdb/record-btrace.c
@@ -623,14 +623,6 @@ btrace_ui_out_decode_error (struct ui_out *uiout, int errcode,
   uiout->text (_("]\n"));
 }
 
-/* Print an unsigned int.  */
-
-static void
-ui_out_field_uint (struct ui_out *uiout, const char *fld, unsigned int val)
-{
-  uiout->field_fmt (fld, "%u", val);
-}
-
 /* A range of source lines.  */
 
 struct btrace_line_range
@@ -1032,9 +1024,9 @@ btrace_call_history_insn_range (struct ui_out *uiout,
   begin = bfun->insn_offset;
   end = begin + size - 1;
 
-  ui_out_field_uint (uiout, "insn begin", begin);
+  uiout->field_unsigned ("insn begin", begin);
   uiout->text (",");
-  ui_out_field_uint (uiout, "insn end", end);
+  uiout->field_unsigned ("insn end", end);
 }
 
 /* Compute the lowest and highest source line for the instructions in BFUN
@@ -1155,7 +1147,7 @@ btrace_call_history (struct ui_out *uiout,
       msym = bfun->msym;
 
       /* Print the function index.  */
-      ui_out_field_uint (uiout, "index", bfun->number);
+      uiout->field_unsigned ("index", bfun->number);
       uiout->text ("\t");
 
       /* Indicate gaps in the trace.  */
diff --git a/gdb/symfile.c b/gdb/symfile.c
index d1c7b0e0034..8394c8a56b8 100644
--- a/gdb/symfile.c
+++ b/gdb/symfile.c
@@ -2085,7 +2085,7 @@ generic_load (const char *args, int from_tty)
   uiout->text ("Start address ");
   uiout->field_core_addr ("address", target_gdbarch (), entry);
   uiout->text (", load size ");
-  uiout->field_fmt ("load-size", "%lu", total_progress.data_count);
+  uiout->field_unsigned ("load-size", total_progress.data_count);
   uiout->text ("\n");
   regcache_write_pc (get_current_regcache (), entry);
 
@@ -2128,29 +2128,29 @@ print_transfer_performance (struct ui_file *stream,
 
       if (uiout->is_mi_like_p ())
 	{
-	  uiout->field_fmt ("transfer-rate", "%lu", rate * 8);
+	  uiout->field_unsigned ("transfer-rate", rate * 8);
 	  uiout->text (" bits/sec");
 	}
       else if (rate < 1024)
 	{
-	  uiout->field_fmt ("transfer-rate", "%lu", rate);
+	  uiout->field_unsigned ("transfer-rate", rate);
 	  uiout->text (" bytes/sec");
 	}
       else
 	{
-	  uiout->field_fmt ("transfer-rate", "%lu", rate / 1024);
+	  uiout->field_unsigned ("transfer-rate", rate / 1024);
 	  uiout->text (" KB/sec");
 	}
     }
   else
     {
-      uiout->field_fmt ("transferred-bits", "%lu", (data_count * 8));
+      uiout->field_unsigned ("transferred-bits", (data_count * 8));
       uiout->text (" bits in <1 sec");
     }
   if (write_count > 0)
     {
       uiout->text (", ");
-      uiout->field_fmt ("write-rate", "%lu", data_count / write_count);
+      uiout->field_unsigned ("write-rate", data_count / write_count);
       uiout->text (" bytes/write");
     }
   uiout->text (".\n");
diff --git a/gdb/ui-out.c b/gdb/ui-out.c
index 6851fd29c6a..65312aa4323 100644
--- a/gdb/ui-out.c
+++ b/gdb/ui-out.c
@@ -462,6 +462,20 @@ ui_out::field_fmt_int (int input_width, ui_align input_align,
   do_field_int (fldno, input_width, input_align, fldname, value);
 }
 
+/* See ui-out.h.  */
+
+void
+ui_out::field_unsigned (const char *fldname, ULONGEST value)
+{
+  int fldno;
+  int width;
+  ui_align align;
+
+  verify_field (&fldno, &width, &align);
+
+  do_field_unsigned (fldno, width, align, fldname, value);
+}
+
 /* Documented in ui-out.h.  */
 
 void
diff --git a/gdb/ui-out.h b/gdb/ui-out.h
index 9eba70eedac..954fad7cf9a 100644
--- a/gdb/ui-out.h
+++ b/gdb/ui-out.h
@@ -110,6 +110,8 @@ class ui_out
   void field_int (const char *fldname, int value);
   void field_fmt_int (int width, ui_align align, const char *fldname,
 		      int value);
+  /* Like field_int, but print an unsigned value.  */
+  void field_unsigned (const char *fldname, ULONGEST value);
   void field_core_addr (const char *fldname, struct gdbarch *gdbarch,
 			CORE_ADDR address);
   void field_string (const char *fldname, const char *string,
@@ -157,6 +159,8 @@ class ui_out
   virtual void do_end (ui_out_type type) = 0;
   virtual void do_field_int (int fldno, int width, ui_align align,
 			     const char *fldname, int value) = 0;
+  virtual void do_field_unsigned (int fldno, int width, ui_align align,
+				  const char *fldname, ULONGEST value) = 0;
   virtual void do_field_skip (int fldno, int width, ui_align align,
 			      const char *fldname) = 0;
   virtual void do_field_string (int fldno, int width, ui_align align,
