diff --git a/src/unix/darwin-proctitle.c b/src/unix/darwin-proctitle.c
index 48f0486d2..90b2e4188 100644
--- a/src/unix/darwin-proctitle.c
+++ b/src/unix/darwin-proctitle.c
@@ -18,8 +18,11 @@
  * IN THE SOFTWARE.
  */
 
-#include <TargetConditionals.h>
 #include <dlfcn.h>
+#include <errno.h>
+#include <stdlib.h>
+
+#include <TargetConditionals.h>
 
 #if !TARGET_OS_IPHONE
 # include <CoreFoundation/CoreFoundation.h>