diff --git a/src/doprnt.c b/src/doprnt.c
index 52a3ccebf36f6dffd80f6367e17fed0b62e8e4f1..1683c414a0882cd5a339d12b2d19c35143f114a2 100644
--- a/src/doprnt.c
+++ b/src/doprnt.c
@@ -20,6 +20,7 @@ along with GNU Emacs; see the file COPYING.  If not, write to
 the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
 
 
+#include <config.h>
 #include <stdio.h>
 #include <ctype.h>