diff --git a/src/compiler/code_generator.ts b/src/compiler/code_generator.ts
index d983c933..81cf3523 100644
--- a/src/compiler/code_generator.ts
+++ b/src/compiler/code_generator.ts
@@ -523,7 +523,7 @@ export class CodeGenerator {
     const isNewBlock = !block || forceNewBlock || ast.dynamicTag !== null;
     let codeIdx = this.target.code.length;
     if (isNewBlock) {
-      if (ast.dynamicTag && ctx.block) {
+      if ((ast.dynamicTag || ctx.tKeyExpr) && ctx.block) {
         this.insertAnchor(ctx.block!);
       }
       block = this.createBlock(block, "block", ctx);
diff --git a/tests/compiler/__snapshots__/t_key.test.ts.snap b/tests/compiler/__snapshots__/t_key.test.ts.snap
index b755f05f..65bff25d 100644
--- a/tests/compiler/__snapshots__/t_key.test.ts.snap
+++ b/tests/compiler/__snapshots__/t_key.test.ts.snap
@@ -68,3 +68,38 @@ exports[`t-key t-key directive in a list 1`] = `
   }
 }"
 `;
+
+exports[`t-key t-key on sub dom node pushes a child block in its parent 1`] = `
+"function anonymous(bdom, helpers
+) {
+  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
+  
+  let block1 = createBlock(\`<div><block-child-0/><block-child-1/></div>\`);
+  let block2 = createBlock(\`<span/>\`);
+  let block3 = createBlock(\`<div><h1/></div>\`);
+  
+  return function template(ctx, node, key = \\"\\") {
+    let b2,b3;
+    if (ctx['hasSpan']) {
+      b2 = block2();
+    }
+    const tKey_1 = ctx['key'];
+    b3 = toggler(tKey_1, block3());
+    return block1([], [b2, b3]);
+  }
+}"
+`;
+
+exports[`t-key t-key on sub dom node pushes a child block in its parent 2`] = `
+"function anonymous(bdom, helpers
+) {
+  let { text, createBlock, list, multi, html, toggler, component, comment } = bdom;
+  
+  let block1 = createBlock(\`<div><h1/></div>\`);
+  
+  return function template(ctx, node, key = \\"\\") {
+    const tKey_1 = ctx['key'];
+    return toggler(tKey_1, block1());
+  }
+}"
+`;
diff --git a/tests/compiler/t_key.test.ts b/tests/compiler/t_key.test.ts
index 20ad0643..7b13a8a5 100644
--- a/tests/compiler/t_key.test.ts
+++ b/tests/compiler/t_key.test.ts
@@ -43,4 +43,24 @@ describe("t-key", () => {
       })
     ).toBe("<ul><li>Chimay Rouge</li></ul>");
   });
+
+  test("t-key on sub dom node pushes a child block in its parent", async () => {
+    const template = `
+      <div>
+        <t t-if="hasSpan"><span /></t>
+        <div t-key="key"><h1 /></div>
+      </div>
+    `;
+
+    expect(renderToString(template, { key: "1" })).toBe("<div><div><h1></h1></div></div>");
+    expect(renderToString(template, { hasSpan: true, key: "1" })).toBe(
+      "<div><span></span><div><h1></h1></div></div>"
+    );
+
+    const template2 = `
+        <div t-key="key"><h1 /></div>
+    `;
+
+    expect(renderToString(template2, { key: "1" })).toBe("<div><h1></h1></div>");
+  });
 });