diff --git a/tja2fumen/parsers.py b/tja2fumen/parsers.py
index 8642da7..89d0e47 100644
--- a/tja2fumen/parsers.py
+++ b/tja2fumen/parsers.py
@@ -336,12 +336,12 @@ def readFumen(fumenFile, byteOrder=None, debug=False):
         measure = {}
         measure["bpm"] = measureStruct[0]
         measure["fumenOffset"] = measureStruct[1]
-        if measureNumber == 0:
-            measure["offset"] = measure["fumenOffset"] + 240000 / measure["bpm"]
-        else:
-            prev = song['measures'][measureNumber - 1]
-            measure["offset"] = ((prev["offset"] + measure["fumenOffset"] + 240000) /
-                                 (measure["bpm"] - prev["fumenOffset"] - 240000 / prev["bpm"]))
+        # if measureNumber == 0:
+        #     measure["offset"] = measure["fumenOffset"] + 240000 / measure["bpm"]
+        # else:
+        #     prev = song['measures'][measureNumber - 1]
+        #     measure["offset"] = ((prev["offset"] + measure["fumenOffset"] + 240000) /
+        #                          (measure["bpm"] - prev["fumenOffset"] - 240000 / prev["bpm"]))
         measure["gogo"] = getBool(measureStruct[2])
         measure["hidden"] = getBool(measureStruct[3])
         measure["padding1"] = measureStruct[4]