1 files changed, 1 insertions, 0 deletions

diff --git a/src/port.c b/src/port.c
index 27c99a0..da750aa 100644
--- a/src/port.c
+++ b/src/port.c
@@ -14,6 +14,7 @@
  */
 
 #include <math.h>
+#include <stdlib.h>
 
 #include "ganv/canvas.h"
 #include "ganv/port.h"