1 files changed, 1 insertions, 0 deletions
diff --git a/lib/pp.c b/lib/pp.c
index 8a9471a..2ec6d99 100644
--- a/lib/pp.c
+++ b/lib/pp.c
@@ -15,6 +15,7 @@
    along with GNU Pies.  If not, see <http://www.gnu.org/licenses/>. */
 
 #include <config.h>
+#include <stdlib.h>
 #include <grecs.h>
 #include <sysexits.h>