diff --git a/gson/src/main/java/com/google/gson/stream/JsonReader.java b/gson/src/main/java/com/google/gson/stream/JsonReader.java
index eaed974527..8a15271df6 100644
--- a/gson/src/main/java/com/google/gson/stream/JsonReader.java
+++ b/gson/src/main/java/com/google/gson/stream/JsonReader.java
@@ -853,7 +853,7 @@ private int peekNumber() throws IOException {
             value = -(c - '0');
             last = NUMBER_CHAR_DIGIT;
           } else if (last == NUMBER_CHAR_DIGIT) {
-            if (value == 0) {
+            if (fitsInLong && value == 0) {
               return PEEKED_NONE; // Leading '0' prefix is not allowed (since it could be octal).
             }
             long newValue = value * 10 - (c - '0');
diff --git a/gson/src/test/java/com/google/gson/stream/JsonReaderTest.java b/gson/src/test/java/com/google/gson/stream/JsonReaderTest.java
index e7916ecf37..e8d546b577 100644
--- a/gson/src/test/java/com/google/gson/stream/JsonReaderTest.java
+++ b/gson/src/test/java/com/google/gson/stream/JsonReaderTest.java
@@ -820,6 +820,20 @@ public void testNumberWithOctalPrefix() throws IOException {
     assertStrictError(e, expectedLocation);
   }
 
+  /**
+   * Regression test for a bug where {@code peekNumber} rejected a valid numeric literal whose
+   * prefix happened to be a multiple of 2<sup>64</sup>. The {@code long} accumulator wraps to
+   * exactly zero in that case, which the old "leading zero" guard misread as an octal prefix.
+   */
+  @Test
+  public void testNumberLongAccumulatorOverflowsToZero() throws IOException {
+    String number = "184467440737095516160";
+    JsonReader reader = new JsonReader(reader(number));
+    reader.setStrictness(Strictness.STRICT);
+    assertThat(reader.peek()).isEqualTo(NUMBER);
+    assertThat(reader.nextString()).isEqualTo(number);
+  }
+
   @Test
   public void testBooleans() throws IOException {
     JsonReader reader = new JsonReader(reader("[true,false]"));