diff --git a/automoc4-0.9.88-fix-blocking.patch b/automoc4-0.9.88-fix-blocking.patch
new file mode 100644
index 0000000..8dcbd4d
--- /dev/null
+++ b/automoc4-0.9.88-fix-blocking.patch
@@ -0,0 +1,11 @@
+--- kde4automoc.cpp.orig	2009-01-22 09:50:09.000000000 -0900
++++ kde4automoc.cpp	2011-11-28 08:49:56.000000000 -0900
+@@ -71,7 +71,7 @@
+             QStringList args(cmakeEchoColorArgs);
+             args << msg;
+             cmakeEcho.start(cmakeExecutable, args, QIODevice::NotOpen);
+-            cmakeEcho.waitForFinished(-1);
++            cmakeEcho.waitForFinished(2000);
+         }
+ 
+         QString builddir;
\ No newline at end of file
diff --git a/automoc4.spec b/automoc4.spec
index c06dca1..0a74791 100644
--- a/automoc4.spec
+++ b/automoc4.spec
@@ -1,14 +1,15 @@
 Name:          automoc4
 Version:       0.9.88
-Release:       3mamba
+Release:       4mamba
 Summary:       Automatic moc for Qt 4 packages
 Group:         Development/Tools
 Vendor:        openmamba
 Distribution:  openmamba
 Packager:      Aleph0 <aleph0@openmamba.org>
 URL:           http://www.kde.org
-Source:        ftp://ftp.kde.org/pub/kde/stable/automoc4/%{version}/automoc4-%{version}.tar.bz2
+Source:        http://download.kde.org/stable/automoc4/%{version}/automoc4-%{version}.tar.bz2
 Patch0:        automoc4-0.9.88-boost-definitions.patch
+Patch1:        automoc4-0.9.88-fix-blocking.patch
 License:       GPL
 ## AUTOBUILDREQ-BEGIN
 BuildRequires: glibc-devel
@@ -26,6 +27,7 @@ This package is part of the KDE4, as a component of the kdesupport module.
 %prep
 %setup -q
 %patch0 -p0
+%patch1 -p0
 
 %build
 %cmake -d build
@@ -44,6 +46,9 @@ This package is part of the KDE4, as a component of the kdesupport module.
 %{_libdir}/automoc4/
 
 %changelog
+* Thu Mar 03 2016 Silvan Calarco <silvan.calarco@mambasoft.it> 0.9.88-4mamba
+- add a patch to fix blocking (https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=163513)
+
 * Fri Feb 26 2016 Silvan Calarco <silvan.calarco@mambasoft.it> 0.9.88-3mamba
 - rebuilt