diff --git a/modules/bullet/shape_bullet.h b/modules/bullet/shape_bullet.h
index 6377f8915dd..dffcadbcdce 100644
--- a/modules/bullet/shape_bullet.h
+++ b/modules/bullet/shape_bullet.h
@@ -105,7 +105,7 @@ private:
 };
 
 class SphereShapeBullet : public ShapeBullet {
-	real_t radius;
+	real_t radius = 0.0;
 
 public:
 	SphereShapeBullet();
@@ -137,8 +137,8 @@ private:
 };
 
 class CapsuleShapeBullet : public ShapeBullet {
-	real_t height;
-	real_t radius;
+	real_t height = 0.0;
+	real_t radius = 0.0;
 
 public:
 	CapsuleShapeBullet();
@@ -155,8 +155,8 @@ private:
 };
 
 class CylinderShapeBullet : public ShapeBullet {
-	real_t height;
-	real_t radius;
+	real_t height = 0.0;
+	real_t radius = 0.0;
 
 public:
 	CylinderShapeBullet();
diff --git a/modules/mono/csharp_script.h b/modules/mono/csharp_script.h
index 2be588cac49..2de923c1253 100644
--- a/modules/mono/csharp_script.h
+++ b/modules/mono/csharp_script.h
@@ -103,8 +103,6 @@ private:
 	bool valid = false;
 	bool reload_invalidated = false;
 
-	bool builtin;
-
 	GDMonoClass *base = nullptr;
 	GDMonoClass *native = nullptr;
 	GDMonoClass *script_class = nullptr;
diff --git a/modules/ogg/ogg_packet_sequence.h b/modules/ogg/ogg_packet_sequence.h
index 7e56b14a24e..73e3cb4fff5 100644
--- a/modules/ogg/ogg_packet_sequence.h
+++ b/modules/ogg/ogg_packet_sequence.h
@@ -104,7 +104,7 @@ class OGGPacketSequencePlayback : public RefCounted {
 
 	mutable ogg_packet *packet;
 
-	uint64_t data_version;
+	uint64_t data_version = 0;
 
 	mutable int64_t packetno = 0;
 
diff --git a/modules/visual_script/editor/visual_script_editor.h b/modules/visual_script/editor/visual_script_editor.h
index f1b01aa6dc1..b01732b2fde 100644
--- a/modules/visual_script/editor/visual_script_editor.h
+++ b/modules/visual_script/editor/visual_script_editor.h
@@ -173,10 +173,10 @@ class VisualScriptEditor : public ScriptEditorBase {
 	String member_name;
 
 	PortAction port_action;
-	int port_action_node;
-	int port_action_output;
+	int port_action_node = 0;
+	int port_action_output = 0;
 	Vector2 port_action_pos;
-	int port_action_new_node;
+	int port_action_new_node = 0;
 
 	bool saved_pos_dirty = false;
 
@@ -196,7 +196,7 @@ class VisualScriptEditor : public ScriptEditorBase {
 	int _create_new_node_from_name(const String &p_text, const Vector2 &p_point);
 	void _selected_new_virtual_method(const String &p_text, const String &p_category, const bool p_connecting);
 
-	int error_line;
+	int error_line = -1;
 
 	void _node_selected(Node *p_node);
 	void _center_on_node(int p_id);
@@ -267,12 +267,12 @@ class VisualScriptEditor : public ScriptEditorBase {
 	bool can_drop_data_fw(const Point2 &p_point, const Variant &p_data, Control *p_from) const;
 	void drop_data_fw(const Point2 &p_point, const Variant &p_data, Control *p_from);
 
-	int editing_id;
-	int editing_input;
+	int editing_id = 0;
+	int editing_input = 0;
 
-	bool can_swap;
-	int data_disconnect_node;
-	int data_disconnect_port;
+	bool can_swap = false;
+	int data_disconnect_node = 0;
+	int data_disconnect_port = 0;
 
 	void _default_value_changed();
 	void _default_value_edited(Node *p_button, int p_id, int p_input_port);
diff --git a/modules/visual_script/editor/visual_script_property_selector.cpp b/modules/visual_script/editor/visual_script_property_selector.cpp
index 1059d126bcd..4072dcebe57 100644
--- a/modules/visual_script/editor/visual_script_property_selector.cpp
+++ b/modules/visual_script/editor/visual_script_property_selector.cpp
@@ -379,8 +379,6 @@ void VisualScriptPropertySelector::_bind_methods() {
 }
 
 VisualScriptPropertySelector::VisualScriptPropertySelector() {
-	virtuals_only = false;
-
 	vbox = memnew(VBoxContainer);
 	add_child(vbox);
 
diff --git a/modules/visual_script/editor/visual_script_property_selector.h b/modules/visual_script/editor/visual_script_property_selector.h
index 3970c4473ec..6b5112f1afa 100644
--- a/modules/visual_script/editor/visual_script_property_selector.h
+++ b/modules/visual_script/editor/visual_script_property_selector.h
@@ -96,16 +96,16 @@ class VisualScriptPropertySelector : public ConfirmationDialog {
 
 	EditorHelpBit *help_bit;
 
-	bool properties;
-	bool visual_script_generic;
-	bool connecting;
+	bool properties = false;
+	bool visual_script_generic = false;
+	bool connecting = false;
 	String selected;
 	Variant::Type type;
 	String base_type;
 	String base_script;
 	ObjectID script;
 	Object *instance;
-	bool virtuals_only;
+	bool virtuals_only = false;
 	VBoxContainer *vbox;
 
 protected: