diff --git a/src/internfile/mh_execm.cpp b/src/internfile/mh_execm.cpp
index 086c8d0b..bc7ce602 100644
--- a/src/internfile/mh_execm.cpp
+++ b/src/internfile/mh_execm.cpp
@@ -17,6 +17,7 @@ static char rcsid[] = "@(#$Id: mh_exec.cpp,v 1.14 2008-10-09 09:19:37 dockes Exp
  *   Free Software Foundation, Inc.,
  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  */
+#include <stdio.h>
 
 #include <iostream>
 #include <sstream>
diff --git a/src/internfile/mh_text.cpp b/src/internfile/mh_text.cpp
index 29ba3541..1768d8f6 100644
--- a/src/internfile/mh_text.cpp
+++ b/src/internfile/mh_text.cpp
@@ -17,6 +17,7 @@ static char rcsid[] = "@(#$Id: mh_text.cpp,v 1.6 2006-12-15 12:40:02 dockes Exp
  *   Free Software Foundation, Inc.,
  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  */
+#include <stdio.h>
 #include <unistd.h>
 #include <sys/stat.h>
 #include <errno.h>
diff --git a/src/query/docseqhist.cpp b/src/query/docseqhist.cpp
index dbf173f3..71262b05 100644
--- a/src/query/docseqhist.cpp
+++ b/src/query/docseqhist.cpp
@@ -17,6 +17,7 @@ static char rcsid[] = "@(#$Id: docseqhist.cpp,v 1.4 2008-09-29 08:59:20 dockes E
  *   Free Software Foundation, Inc.,
  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  */
+#include <stdio.h>
 #include <math.h>
 #include <time.h>
 #include <cmath>
diff --git a/src/utils/circache.cpp b/src/utils/circache.cpp
index cc760c2a..49e9df50 100644
--- a/src/utils/circache.cpp
+++ b/src/utils/circache.cpp
@@ -19,7 +19,7 @@ static char rcsid[] = "@(#$Id: $ (C) 2009 J.F.Dockes";
 #endif
 
 #ifndef TEST_CIRCACHE
-
+#include <stdio.h>
 #include <assert.h>
 #include <errno.h>
 #include <sys/stat.h>