diff --git a/src/gui/gui_common_elements.hpp b/src/gui/gui_common_elements.hpp
index 95030222a..dba7796b6 100644
--- a/src/gui/gui_common_elements.hpp
+++ b/src/gui/gui_common_elements.hpp
@@ -2152,6 +2152,8 @@ class category_filter_button : public right_click_button_element_base {
 		case country_list_filter::neighbors_no_vassals:
 			t_category = country_list_filter::neighbors;
 			break;
+		default:
+			break;
 		}
 		disabled = t_category != category;
 		button_element_base::render(state, x, y);
diff --git a/src/gui/gui_event.hpp b/src/gui/gui_event.hpp
index f06e5659b..cc817d72f 100644
--- a/src/gui/gui_event.hpp
+++ b/src/gui/gui_event.hpp
@@ -118,7 +118,7 @@ enum event_pool_slot : uint8_t {
 };
 class base_event_option_listbox : public listbox_element_base<event_option_button_row, int32_t> {
 public:
-	void on_update(sys::state& state) noexcept;
+	void on_update(sys::state& state) noexcept override;
 };
 class national_event_listbox : public base_event_option_listbox {
 protected:
diff --git a/src/gui/gui_topbar.hpp b/src/gui/gui_topbar.hpp
index 37c156b4d..a50d4c62f 100644
--- a/src/gui/gui_topbar.hpp
+++ b/src/gui/gui_topbar.hpp
@@ -950,7 +950,7 @@ class topbar_pause_button : public button_element_base {
 
 		float nh_temp = 15.f;
 		std::string nh_season;
-		if(ymd.month == 12 || (ymd.month >= 0 && ymd.month <= 2)) {
+		if(ymd.month == 12 || ymd.month <= 2) {
 			nh_season = text::produce_simple_string(state, "topbar_date_season_winter");
 		} else if(ymd.month >= 3 && ymd.month <= 5) {
 			nh_season = text::produce_simple_string(state, "topbar_date_season_spring");
@@ -966,7 +966,7 @@ class topbar_pause_button : public button_element_base {
 			sh_season = text::produce_simple_string(state, "topbar_date_season_winter");
 		} else if(ymd.month >= 9 && ymd.month <= 11) {
 			sh_season = text::produce_simple_string(state, "topbar_date_season_spring");
-		} else if(ymd.month == 12 || (ymd.month >= 0 && ymd.month <= 2)) {
+		} else if(ymd.month == 12 || ymd.month <= 2) {
 			sh_season = text::produce_simple_string(state, "topbar_date_season_summer");
 		} else if(ymd.month >= 3 && ymd.month <= 5) {
 			sh_season = text::produce_simple_string(state, "topbar_date_season_fall");
diff --git a/src/network/network.cpp b/src/network/network.cpp
index 87415cd0b..1442401d4 100644
--- a/src/network/network.cpp
+++ b/src/network/network.cpp
@@ -343,12 +343,12 @@ static uint8_t const* with_network_decompressed_section(uint8_t const* ptr_in, T
 
 bool client_data::is_banned(sys::state& state) const {
 	if(state.network_state.as_v6) {
-		auto sa = (struct sockaddr_in6*)&address;
+		auto sa = (struct sockaddr_in6 const*)&address;
 		return std::find_if(state.network_state.v6_banlist.begin(), state.network_state.v6_banlist.end(), [&](auto const& a) {
 			return std::memcmp(&sa->sin6_addr, &a, sizeof(a)) == 0;
 		}) != state.network_state.v6_banlist.end();
 	} else {
-		auto sa = (struct sockaddr_in*)&address;
+		auto sa = (struct sockaddr_in const*)&address;
 		return std::find_if(state.network_state.v4_banlist.begin(), state.network_state.v4_banlist.end(), [&](auto const& a) {
 			return std::memcmp(&sa->sin_addr, &a, sizeof(a)) == 0;
 		}) != state.network_state.v4_banlist.end();