diff --git a/Source/NSTask.m b/Source/NSTask.m
index ba8e33a17..9d7958a81 100644
--- a/Source/NSTask.m
+++ b/Source/NSTask.m
@@ -36,6 +36,7 @@
 #include <Foundation/NSNotification.h>
 #include <Foundation/NSNotificationQueue.h>
 #include <Foundation/NSTask.h>
+#include <Foundation/NSDebug.h>
 
 #include <sys/signal.h>
 #include <sys/types.h>