diff --git a/acinclude.m4 b/acinclude.m4
index 9c7f451..922e5d1 100644
--- a/acinclude.m4
+++ b/acinclude.m4
@@ -484,6 +484,7 @@ dnl
       AC_TRY_RUN([
 #include <sane/sane.h>
 #include <stdio.h>
+#include <stdlib.h>
 
 int 
 main ()
diff --git a/aclocal.m4 b/aclocal.m4
index b83ffbb..88829e4 100644
--- a/aclocal.m4
+++ b/aclocal.m4
@@ -494,6 +494,7 @@ dnl
       AC_TRY_RUN([
 #include <sane/sane.h>
 #include <stdio.h>
+#include <stdlib.h>
 
 int 
 main ()
diff --git a/configure b/configure
index 427c259..0cc9f61 100755
--- a/configure
+++ b/configure
@@ -7565,6 +7565,7 @@ cat >>conftest.$ac_ext <<_ACEOF
 
 #include <sane/sane.h>
 #include <stdio.h>
+#include <stdlib.h>
 
 int
 main ()