diff --git a/deps/oblib/src/lib/container/ob_bitmap.cpp b/deps/oblib/src/lib/container/ob_bitmap.cpp
index 3d41f48415..940f26600d 100644
--- a/deps/oblib/src/lib/container/ob_bitmap.cpp
+++ b/deps/oblib/src/lib/container/ob_bitmap.cpp
@@ -140,10 +140,12 @@ int ObBitmap::load_blocks_from_array(size_type *block_data, size_type num_bits)
         walk_ptr = walk_ptr->next_;
       }
       // Set bits in the same block after @valid_bits_ to false
-      size_type inner_pos = valid_bits_;
-      walk_ptr = find_block(valid_bits_, inner_pos);
-      for (size_type i = bit_index(inner_pos); i < BITS_PER_BLOCK; ++i) {
-        walk_ptr->bits_[block_index(inner_pos)] &= ~bit_mask(i);
+      if (0 != (valid_bits_ & BLOCK_MOD_MASK)) {
+        size_type inner_pos = valid_bits_;
+        walk_ptr = find_block(valid_bits_, inner_pos);
+        for (size_type i = bit_index(inner_pos); i < BITS_PER_BLOCK; ++i) {
+          walk_ptr->bits_[block_index(inner_pos)] &= ~bit_mask(i);
+        }
       }
     }
   }
diff --git a/deps/oblib/unittest/lib/container/test_bitmap.cpp b/deps/oblib/unittest/lib/container/test_bitmap.cpp
index 918219a93b..48cd2be353 100644
--- a/deps/oblib/unittest/lib/container/test_bitmap.cpp
+++ b/deps/oblib/unittest/lib/container/test_bitmap.cpp
@@ -142,6 +142,15 @@ TEST_F(TestObBitmap, load_from_array)
   EXPECT_EQ(OB_SUCCESS, bitmap.load_blocks_from_array(data, 64 * 5));
   EXPECT_EQ(64 * 5, bitmap.size());
   EXPECT_EQ(3 * 5, bitmap.popcnt());
+
+  bitmap.expand_size(4096);
+  ObBitmap::size_type data2[64];
+  for (int64_t i = 0; i < 64; i++) {
+    data2[i] = 7;
+  }
+  EXPECT_EQ(OB_SUCCESS, bitmap.load_blocks_from_array(data2, 64 * 64));
+  EXPECT_EQ(64 * 64, bitmap.size());
+  EXPECT_EQ(3 * 64, bitmap.popcnt());
 }
 
 } // end of namespace unittest