diff --git NetworkManager/src/supplicant-manager/nm-supplicant-interface.c NetworkManager/src/supplicant-manager/nm-supplicant-interface.c

index 43cd167..8ceb3b2 100644

--- NetworkManager/src/supplicant-manager/nm-supplicant-interface.c

+++ NetworkManager/src/supplicant-manager/nm-supplicant-interface.c

@@ -22,6 +22,12 @@

 #include <stdio.h>

 #include <string.h>

 #include <glib.h>

+/*strtoul(), kill() end errno in kill_wpa_supplicant()*/

+#include <stdlib.h>

+#include <errno.h>

+#include <signal.h>

+/*sleep()*/

+#include <unistd.h>

 #include "nm-supplicant-interface.h"

 #include "nm-supplicant-manager.h"

@@ -725,6 +731,33 @@ nm_supplicant_interface_add_cb (DBusGProxy *proxy, DBusGProxyCall *call_id, gpoi

 	}

 }

+static void 

+kill_wpa_supplicant (const char *iface)

+{

+	char *pidfile = NULL;

+	char *pid_contents = NULL;

+	

+	g_assert(iface != NULL);

+

+	pidfile = g_strdup_printf("/var/run/wpa_supplicant-%s.pid", iface);

+	g_assert(pidfile != NULL);

+

+	if (g_file_get_contents (pidfile, &pid_contents, NULL, NULL))

+	{

+		unsigned long int pid = strtoul (pid_contents, NULL, 10);

+		if ( !((pid == ULONG_MAX) && (errno == ERANGE)) ) 

+		{

+			if(!kill((pid_t)pid, SIGTERM))

+			{

+				remove (pidfile);

+				sleep(1);

+			}

+		}

+		g_free(pid_contents);

+	}

+	g_free(pidfile);

+}

+

 static void

 nm_supplicant_interface_add_to_supplicant (NMSupplicantInterface * self,

                                            gboolean get_only)

@@ -757,6 +790,8 @@ nm_supplicant_interface_add_to_supplicant (NMSupplicantInterface * self,

 		g_value_set_string (driver, priv->is_wireless ? "wext" : "wired");

 		g_hash_table_insert (hash, "driver", driver);

+		kill_wpa_supplicant(priv->dev);

+

 		call = dbus_g_proxy_begin_call (proxy,

 										"addInterface",

 										nm_supplicant_interface_add_cb,