diff --git a/lib/libnet/libnet.c b/lib/libnet/libnet.c
index 439c0cd47..9eb1cb679 100644
--- a/lib/libnet/libnet.c
+++ b/lib/libnet/libnet.c
@@ -121,7 +121,7 @@ void	netSetDefaultRoute( char *gw )
 	struct sockaddr_in	*in_addr;
 	unsigned char		*addr;
 	int					fd;
-	unsigned char		adr_gw[4];
+	unsigned char		adr_gw[4] = {0};
 
 	scanip( gw, adr_gw );
 
diff --git a/lib/libtuxtxt/tuxtxt_common.h b/lib/libtuxtxt/tuxtxt_common.h
index df094ab05..783c485d8 100644
--- a/lib/libtuxtxt/tuxtxt_common.h
+++ b/lib/libtuxtxt/tuxtxt_common.h
@@ -184,7 +184,7 @@ void tuxtxt_decode_btt()
 {
 	/* basic top table */
 	int i, current, b1, b2, b3, b4;
-	unsigned char btt[23*40];
+	unsigned char btt[23*40] = {0};
 
 	if (tuxtxt_cache.subpagetable[0x1f0] == 0xff || 0 == tuxtxt_cache.astCachetable[0x1f0][tuxtxt_cache.subpagetable[0x1f0]]) /* not yet received */
 		return;
diff --git a/src/gui/network_setup.cpp b/src/gui/network_setup.cpp
index 956f69beb..a32121079 100644
--- a/src/gui/network_setup.cpp
+++ b/src/gui/network_setup.cpp
@@ -606,11 +606,11 @@ void CNetworkSetup::setWizardMode(bool mode)
 
 void CNetworkSetup::showCurrentNetworkSettings()
 {
-	char ip[16];
-	char mask[16];
-	char broadcast[16];
-	char router[16];
-	char nameserver[16];
+	char ip[16] = {0};
+	char mask[16] = {0};
+	char broadcast[16] = {0};
+	char router[16] = {0};
+	char nameserver[16] = {0};
 	std::string text;
 
 	netGetIP(g_settings.ifname, ip, mask, broadcast);