diff --git a/lexor.lex b/lexor.lex
index e9de8dafa..80402bdc5 100644
--- a/lexor.lex
+++ b/lexor.lex
@@ -26,7 +26,7 @@
 
       //# define YYSTYPE lexval
 
-# include  <iostream>
+# include  <cstdarg>
 # include  "compiler.h"
 # include  "parse_misc.h"
 # include  "parse_api.h"
diff --git a/lexor_keyword.gperf b/lexor_keyword.gperf
index 295d2b7a4..369169360 100644
--- a/lexor_keyword.gperf
+++ b/lexor_keyword.gperf
@@ -9,6 +9,7 @@
 %{
 /* Command-line: gperf -o -i 7 -C -k '1-4,6,9,$' -H keyword_hash -N check_identifier -t ./lexor_keyword.gperf  */
 
+#include <cstdarg>
 #include "config.h"
 #include "parse_misc.h"
 #include "parse.h"
diff --git a/parse.y b/parse.y
index 5e41f7e69..19589ba1f 100644
--- a/parse.y
+++ b/parse.y
@@ -22,6 +22,7 @@
 
 # include "config.h"
 
+# include  <cstdarg>
 # include  "parse_misc.h"
 # include  "compiler.h"
 # include  "pform.h"
diff --git a/parse_misc.cc b/parse_misc.cc
index 7ff8f1648..89587c6e2 100644
--- a/parse_misc.cc
+++ b/parse_misc.cc
@@ -19,8 +19,8 @@
 
 # include "config.h"
 
-# include  "parse_misc.h"
 # include  <cstdarg>
+# include  "parse_misc.h"
 # include  <cstdio>
 # include  <iostream>
 
diff --git a/pform.cc b/pform.cc
index 01cd48d8d..b28a72735 100644
--- a/pform.cc
+++ b/pform.cc
@@ -20,6 +20,7 @@
 
 # include "config.h"
 
+# include  <cstdarg>
 # include  "compiler.h"
 # include  "pform.h"
 # include  "parse_misc.h"
diff --git a/pform_analog.cc b/pform_analog.cc
index 4f76ead38..b849f6b82 100644
--- a/pform_analog.cc
+++ b/pform_analog.cc
@@ -17,6 +17,7 @@
  *    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  */
 
+# include  <cstdarg>
 # include  "config.h"
 # include  "compiler.h"
 # include  "pform.h"
diff --git a/pform_disciplines.cc b/pform_disciplines.cc
index a617e104c..0f62da728 100644
--- a/pform_disciplines.cc
+++ b/pform_disciplines.cc
@@ -17,6 +17,7 @@
  *    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  */
 
+# include  <cstdarg>
 # include  "config.h"
 # include  "compiler.h"
 # include  "pform.h"
diff --git a/pform_package.cc b/pform_package.cc
index 4acccce2d..9e33f2e4e 100644
--- a/pform_package.cc
+++ b/pform_package.cc
@@ -18,6 +18,7 @@
  *    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  */
 
+# include  <cstdarg>
 # include  "pform.h"
 # include  "PPackage.h"
 # include  "parse_misc.h"
diff --git a/pform_pclass.cc b/pform_pclass.cc
index f922b9df9..5d0745b88 100644
--- a/pform_pclass.cc
+++ b/pform_pclass.cc
@@ -17,6 +17,7 @@
  *    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  */
 
+# include  <cstdarg>
 # include  "pform.h"
 # include  "PClass.h"
 # include  "parse_misc.h"