diff --git a/packages/language-server/src/plugins/typescript/features/CodeActionsProvider.ts b/packages/language-server/src/plugins/typescript/features/CodeActionsProvider.ts
index dac8c9d6b..b731accc0 100644
--- a/packages/language-server/src/plugins/typescript/features/CodeActionsProvider.ts
+++ b/packages/language-server/src/plugins/typescript/features/CodeActionsProvider.ts
@@ -171,6 +171,14 @@ export class CodeActionsProviderImpl implements CodeActionsProvider {
                                     );
                                 }
 
+                                if (fix.fixName === 'fixMissingFunctionDeclaration') {
+                                    originalRange = this.checkEndOfFileCodeInsert(
+                                        originalRange,
+                                        range,
+                                        document
+                                    );
+                                }
+
                                 return TextEdit.replace(originalRange, edit.newText);
                             })
                         );
@@ -327,23 +335,12 @@ export class CodeActionsProviderImpl implements CodeActionsProvider {
             TextDocumentEdit.create(
                 VersionedTextDocumentIdentifier.create(document.uri, 0),
                 edit.textChanges.map((edit) => {
-                    let range = mapRangeToOriginal(fragment, convertRange(fragment, edit.span));
-                    // Some refactorings place the new code at the end of svelte2tsx' render function,
-                    // which is unmapped. In this case, add it to the end of the script tag ourselves.
-                    if (range.start.line < 0 || range.end.line < 0) {
-                        if (isRangeInTag(originalRange, document.scriptInfo)) {
-                            range = Range.create(
-                                document.scriptInfo.endPos,
-                                document.scriptInfo.endPos
-                            );
-                        } else if (isRangeInTag(originalRange, document.moduleScriptInfo)) {
-                            range = Range.create(
-                                document.moduleScriptInfo.endPos,
-                                document.moduleScriptInfo.endPos
-                            );
-                        }
-                    }
-                    return TextEdit.replace(range, edit.newText);
+                    const range = mapRangeToOriginal(fragment, convertRange(fragment, edit.span));
+
+                    return TextEdit.replace(
+                        this.checkEndOfFileCodeInsert(range, originalRange, document),
+                        edit.newText
+                    );
                 })
             )
         );
@@ -351,6 +348,24 @@ export class CodeActionsProviderImpl implements CodeActionsProvider {
         return { documentChanges };
     }
 
+    /**
+     * Some refactorings place the new code at the end of svelte2tsx' render function,
+     *  which is unmapped. In this case, add it to the end of the script tag ourselves.
+     */
+    private checkEndOfFileCodeInsert(resultRange: Range, targetRange: Range, document: Document) {
+        if (resultRange.start.line < 0 || resultRange.end.line < 0) {
+            if (isRangeInTag(targetRange, document.scriptInfo)) {
+                resultRange = Range.create(document.scriptInfo.endPos, document.scriptInfo.endPos);
+            } else if (isRangeInTag(targetRange, document.moduleScriptInfo)) {
+                resultRange = Range.create(
+                    document.moduleScriptInfo.endPos,
+                    document.moduleScriptInfo.endPos
+                );
+            }
+        }
+        return resultRange;
+    }
+
     private getLSAndTSDoc(document: Document) {
         return this.lsAndTsDocResolver.getLSAndTSDoc(document);
     }
diff --git a/packages/language-server/test/plugins/typescript/features/CodeActionsProvider.test.ts b/packages/language-server/test/plugins/typescript/features/CodeActionsProvider.test.ts
index 2630bc70f..13f701011 100644
--- a/packages/language-server/test/plugins/typescript/features/CodeActionsProvider.test.ts
+++ b/packages/language-server/test/plugins/typescript/features/CodeActionsProvider.test.ts
@@ -95,6 +95,63 @@ describe('CodeActionsProvider', () => {
         ]);
     });
 
+    it('provides quickfix for missing function', async () => {
+        const { provider, document } = setup('codeactions.svelte');
+
+        const codeActions = await provider.getCodeActions(
+            document,
+            Range.create(Position.create(9, 0), Position.create(9, 3)),
+            {
+                diagnostics: [
+                    {
+                        code: 2304,
+                        message: "Cannot find name 'abc'.",
+                        range: Range.create(Position.create(9, 0), Position.create(9, 3)),
+                        source: 'ts'
+                    }
+                ],
+                only: [CodeActionKind.QuickFix]
+            }
+        );
+
+        (<TextDocumentEdit>codeActions[0]?.edit?.documentChanges?.[0])?.edits.forEach(
+            (edit) => (edit.newText = harmonizeNewLines(edit.newText))
+        );
+
+        assert.deepStrictEqual(codeActions, [
+            {
+                edit: {
+                    documentChanges: [
+                        {
+                            edits: [
+                                {
+                                    newText:
+                                        "\n\nfunction abc() {\nthrow new Error('Function not implemented.');\n}\n",
+                                    range: {
+                                        start: {
+                                            character: 0,
+                                            line: 10
+                                        },
+                                        end: {
+                                            character: 0,
+                                            line: 10
+                                        }
+                                    }
+                                }
+                            ],
+                            textDocument: {
+                                uri: getUri('codeactions.svelte'),
+                                version: 0
+                            }
+                        }
+                    ]
+                },
+                kind: CodeActionKind.QuickFix,
+                title: "Add missing function declaration 'abc'"
+            }
+        ]);
+    });
+
     it('organizes imports', async () => {
         const { provider, document } = setup('codeactions.svelte');
 
@@ -428,11 +485,11 @@ describe('CodeActionsProvider', () => {
                             range: {
                                 start: {
                                     character: 0,
-                                    line: 9
+                                    line: 10
                                 },
                                 end: {
                                     character: 0,
-                                    line: 9
+                                    line: 10
                                 }
                             }
                         }
diff --git a/packages/language-server/test/plugins/typescript/testfiles/codeactions.svelte b/packages/language-server/test/plugins/typescript/testfiles/codeactions.svelte
index c7ff8b71e..f38f7368b 100644
--- a/packages/language-server/test/plugins/typescript/testfiles/codeactions.svelte
+++ b/packages/language-server/test/plugins/typescript/testfiles/codeactions.svelte
@@ -7,4 +7,5 @@ import {D} from 'd';
 let a = true;
 A;C;
 let b = Math.random() > 0.5 ? true : false;
+abc();
 </script>