diff --git a/packages/core/src/components/progress/progress.tsx b/packages/core/src/components/progress/progress.tsx
index 7ce7f08..7291ef7 100644
--- a/packages/core/src/components/progress/progress.tsx
+++ b/packages/core/src/components/progress/progress.tsx
@@ -40,17 +40,18 @@ export function Progress(props: ProgressProps): JSX.Element {
   };
 
   const valueNow = (): number | undefined => {
-    return isIndeterminate() ? undefined : currentValue() || undefined;
+    const v = currentValue();
+    return isIndeterminate() || v === null ? undefined : v;
   };
 
   const dataValue = (): number | undefined => {
-    return isIndeterminate() ? undefined : currentValue() || undefined;
+    const v = currentValue();
+    return isIndeterminate() || v === null ? undefined : v;
   };
 
   return (
     <div
       role="progressbar"
-      tabIndex={-1}
       aria-valuemin={0}
       aria-valuemax={max()}
       aria-valuenow={valueNow()}
diff --git a/packages/core/tests/components/progress/progress.test.tsx b/packages/core/tests/components/progress/progress.test.tsx
index df7ec8b..e96e008 100644
--- a/packages/core/tests/components/progress/progress.test.tsx
+++ b/packages/core/tests/components/progress/progress.test.tsx
@@ -48,4 +48,10 @@ describe("Progress", () => {
     render(() => <Progress value={75} />);
     expect(screen.getByRole("progressbar").getAttribute("data-state")).toBe("complete");
   });
+
+  it("sets aria-valuenow=0 when value is zero", () => {
+    render(() => <Progress value={0} />);
+    expect(screen.getByRole("progressbar").getAttribute("aria-valuenow")).toBe("0");
+    expect(screen.getByRole("progressbar").getAttribute("data-state")).toBe("complete");
+  });
 });