--- src/corelib/io/qprocess_unix.cpp.orig	2011-11-17 17:04:43.000000000 +0100
+++ src/corelib/io/qprocess_unix.cpp	2011-11-17 17:06:42.000000000 +0100
@@ -47,6 +47,7 @@
 #if defined QPROCESS_DEBUG
 #include "qstring.h"
 #include <ctype.h>
+#include <stdio.h>
 
 /*
     Returns a human readable representation of the first \a len
@@ -507,6 +508,16 @@ inline pid_t qt_fork()
 {
 #if defined(Q_OS_QNX)
     return vfork();
+#elif defined(Q_OS_FREEBSD)
+    int ret;
+    flockfile(stdin);
+    flockfile(stdout);
+    flockfile(stderr);
+    ret = fork();
+    funlockfile(stdin);
+    funlockfile(stdout);
+    funlockfile(stderr);
+    return (ret);
 #else
     return fork();
 #endif