diff --git a/misc/extension_api_validation/4.3-stable.expected b/misc/extension_api_validation/4.3-stable.expected
index 5a27302a1267..ea0ccfb0fea1 100644
--- a/misc/extension_api_validation/4.3-stable.expected
+++ b/misc/extension_api_validation/4.3-stable.expected
@@ -268,3 +268,11 @@ GH-98441
 Validate extension JSON: Error: Field 'global_enums/KeyModifierMask/values/KEY_MODIFIER_MASK': value changed value in new API, from 5.32677e+08 to 2130706432.
 
 Key modifier mask value corrected. API change documented for compatibility.
+
+
+GH-100019
+--------
+Validate extension JSON: Error: Field 'classes/CodeEdit/methods/add_code_completion_option/arguments': size changed value in new API, from 6 to 8.
+Validate extension JSON: Error: Field 'classes/CodeEdit/methods/add_code_completion_option/arguments': size changed value in new API, from 7 to 8.
+
+New argument `deprecated` added to `add_code_completion_option`. Compatibility method registered.
diff --git a/scene/gui/code_edit.compat.inc b/scene/gui/code_edit.compat.inc
index 8dd7c00aa458..97d91c001ed1 100644
--- a/scene/gui/code_edit.compat.inc
+++ b/scene/gui/code_edit.compat.inc
@@ -38,9 +38,15 @@ void CodeEdit::_add_code_completion_option_compat_84906(CodeCompletionKind p_typ
 	add_code_completion_option(p_type, p_display_text, p_insert_text, p_text_color, p_icon, p_value, p_location);
 }
 
+void CodeEdit::_add_code_completion_option_compat_100019(CodeCompletionKind p_type, const String &p_display_text, const String &p_insert_text, const Color &p_text_color, const Ref<Resource> &p_icon, const Variant &p_value, int p_location) {
+	add_code_completion_option(p_type, p_display_text, p_insert_text, p_text_color, p_icon, p_value, p_location, false);
+}
+
 void CodeEdit::_bind_compatibility_methods() {
 	ClassDB::bind_compatibility_method(D_METHOD("get_text_for_symbol_lookup"), &CodeEdit::_get_text_for_symbol_lookup_bind_compat_73196);
+
 	ClassDB::bind_compatibility_method(D_METHOD("add_code_completion_option", "type", "display_text", "insert_text", "text_color", "icon", "value", "location"), &CodeEdit::_add_code_completion_option_compat_84906, DEFVAL(Color(1, 1, 1)), DEFVAL(Ref<Resource>()), DEFVAL(Variant::NIL), DEFVAL(LOCATION_OTHER));
+	ClassDB::bind_compatibility_method(D_METHOD("add_code_completion_option", "type", "display_text", "insert_text", "text_color", "icon", "value", "location"), &CodeEdit::_add_code_completion_option_compat_100019, DEFVAL(Color(1, 1, 1)), DEFVAL(Ref<Resource>()), DEFVAL(Variant()), DEFVAL(LOCATION_OTHER));
 }
 
 #endif
diff --git a/scene/gui/code_edit.h b/scene/gui/code_edit.h
index 39d61505735f..bb111f03ba87 100644
--- a/scene/gui/code_edit.h
+++ b/scene/gui/code_edit.h
@@ -319,6 +319,7 @@ class CodeEdit : public TextEdit {
 #ifndef DISABLE_DEPRECATED
 	String _get_text_for_symbol_lookup_bind_compat_73196();
 	void _add_code_completion_option_compat_84906(CodeCompletionKind p_type, const String &p_display_text, const String &p_insert_text, const Color &p_text_color = Color(1, 1, 1), const Ref<Resource> &p_icon = Ref<Resource>(), const Variant &p_value = Variant::NIL, int p_location = LOCATION_OTHER);
+	void _add_code_completion_option_compat_100019(CodeCompletionKind p_type, const String &p_display_text, const String &p_insert_text, const Color &p_text_color = Color(1, 1, 1), const Ref<Resource> &p_icon = Ref<Resource>(), const Variant &p_value = Variant(), int p_location = LOCATION_OTHER);
 	static void _bind_compatibility_methods();
 #endif