diff --git a/libfm-1.2.3-upstream-fix-pkexec.patch b/libfm-1.2.3-upstream-fix-pkexec.patch
new file mode 100644
index 0000000..f19ab83
--- /dev/null
+++ b/libfm-1.2.3-upstream-fix-pkexec.patch
@@ -0,0 +1,69 @@
+From fad5a9a3e3a3148d1275b7ba048614aa4c7c0414 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Lu=C3=ADs=20Pereira?= <luis.artur.pereira@gmail.com>
+Date: Thu, 7 May 2015 21:57:42 +0300
+Subject: [PATCH] Use G_SPAWN_DO_NOT_REAP_CHILD on application launch, that
+ should fix a problem with pkexec.
+
+---
+ NEWS                   |  3 +++
+ src/base/fm-app-info.c | 19 ++++++++++++++++---
+ 2 files changed, 19 insertions(+), 3 deletions(-)
+
+diff --git a/NEWS b/NEWS
+index 60d70a1..964fd67 100644
+--- a/NEWS
++++ b/NEWS
+@@ -6,6 +6,9 @@
+ 
+ * Fixed missing folder info update on folder attributes change.
+ 
++* Use G_SPAWN_DO_NOT_REAP_CHILD on application launch, that should fix
++    a problem with pkexec.
++
+ 
+ Changes on 1.2.3 since 1.2.2:
+ 
+diff --git a/src/base/fm-app-info.c b/src/base/fm-app-info.c
+index c374982..5bd4433 100644
+--- a/src/base/fm-app-info.c
++++ b/src/base/fm-app-info.c
+@@ -204,6 +204,15 @@ static void child_setup(gpointer user_data)
+     setpgid(0, data->pgid);
+ }
+ 
++static void child_watch(GPid pid, gint status, gpointer user_data)
++{
++    /*
++     * Ensure that we don't double fork and break pkexec
++     */
++    g_spawn_close_pid(pid);
++}
++
++
+ static char* expand_terminal(char* cmd, gboolean keep_open, GError** error)
+ {
+     FmTerminal* term;
+@@ -246,6 +255,7 @@ static gboolean do_launch(GAppInfo* appinfo, const char* full_desktop_path,
+     int argc;
+     gboolean use_terminal;
+     GAppInfoCreateFlags flags;
++    GPid pid;
+ 
+     cmd = expand_exec_macros(appinfo, full_desktop_path, kf, inp, &gfiles);
+     if(G_LIKELY(kf))
+@@ -315,9 +325,12 @@ static gboolean do_launch(GAppInfo* appinfo, const char* full_desktop_path,
+ 
+         data.pgid = getpgid(getppid());
+         ret = g_spawn_async(path, argv, NULL,
+-                            G_SPAWN_SEARCH_PATH,
+-                            child_setup, &data, NULL, err);
+-        if (!ret && data.sn_id)
++                            G_SPAWN_SEARCH_PATH | G_SPAWN_DO_NOT_REAP_CHILD,
++                            child_setup, &data, &pid, err);
++        if (ret)
++            /* Ensure that we don't double fork and break pkexec */
++            g_child_watch_add(pid, child_watch, NULL);
++        else if (data.sn_id)
+             /* Notify launch context about failure */
+             g_app_launch_context_launch_failed(ctx, data.sn_id);
+ 
diff --git a/libfm.spec b/libfm.spec
index 7fa3be1..3544b93 100644
--- a/libfm.spec
+++ b/libfm.spec
@@ -1,6 +1,6 @@
 Name:          libfm
 Version:       1.2.3
-Release:       1mamba
+Release:       2mamba
 Summary:       A library used by the PCMan File Manager
 Group:         System/Libraries
 Vendor:        openmamba
@@ -13,6 +13,7 @@ URL:           http://sourceforge.net/projects/pcmanfm
 # make
 # make dist
 Source:        http://downloads.sourceforge.net/project/pcmanfm/PCManFM%20%2B%20Libfm%20%28tarball%20release%29/LibFM/libfm-%{version}.tar.xz
+Patch0:        libfm-1.2.3-upstream-fix-pkexec.patch
 License:       GPL
 ## AUTOBUILDREQ-BEGIN
 BuildRequires: glibc-devel
@@ -60,6 +61,7 @@ This package contains static libraries and header files need for development.
 
 %prep
 %setup -q
+%patch0 -p1
 
 %build
 %configure \
@@ -132,6 +134,9 @@ fi
 %doc README TODO
 
 %changelog
+* Thu Feb 04 2016 Silvan Calarco <silvan.calarco@mambasoft.it> 1.2.3-2mamba
+- upstream patch to fix running apps with pkexec
+
 * Sun Oct 26 2014 Silvan Calarco <silvan.calarco@mambasoft.it> 1.2.3-1mamba
 - update to 1.2.3