diff --git a/test/data/187.idx b/test/data/187.idx
new file mode 100644
index 000000000..d4cb42ef0
Binary files /dev/null and b/test/data/187.idx differ
diff --git a/weed/storage/needle_map/compact_map.go b/weed/storage/needle_map/compact_map.go
index 2b1a471bc..9495a49ab 100644
--- a/weed/storage/needle_map/compact_map.go
+++ b/weed/storage/needle_map/compact_map.go
@@ -96,6 +96,7 @@ func (cs *CompactSection) setOverflowEntry(skey SectionalNeedleId, offset Offset
 			cs.overflowExtra[i] = cs.overflowExtra[i-1]
 		}
 		cs.overflow[insertCandidate] = needleValue
+		cs.overflowExtra[insertCandidate] = needleValueExtra
 	}
 }
 
diff --git a/weed/storage/needle_map/compact_map_cases_test.go b/weed/storage/needle_map/compact_map_cases_test.go
new file mode 100644
index 000000000..a0142b57d
--- /dev/null
+++ b/weed/storage/needle_map/compact_map_cases_test.go
@@ -0,0 +1,33 @@
+// +build 5BytesOffset
+
+package needle_map
+
+import (
+	"fmt"
+	"github.com/chrislusf/seaweedfs/weed/storage/types"
+	"github.com/stretchr/testify/assert"
+	"log"
+	"os"
+	"testing"
+)
+
+func Test5bytesIndexLoading(t *testing.T) {
+
+	indexFile, ie := os.OpenFile("../../../test/data/187.idx", os.O_RDWR|os.O_RDONLY, 0644)
+	if ie != nil {
+		log.Fatalln(ie)
+	}
+	defer indexFile.Close()
+	m, rowCount := loadNewNeedleMap(indexFile)
+
+	println("total entries:", rowCount)
+
+	key := types.NeedleId(0x671b905)
+
+	needle, found := m.Get(types.NeedleId(0x671b905))
+
+	fmt.Printf("%v key:%v offset:%v size:%v\n", found, key, needle.Offset, needle.Size)
+
+	assert.Equal(t, int64(12884911892)*8, needle.Offset.ToActualOffset(), "offset")
+
+}