diff --git a/ts2panda/ts2abc/ts2abc.cpp b/ts2panda/ts2abc/ts2abc.cpp
index 6d5e7b14a7497f4edb2dff5b16972799ccc0d49e..d3f163a39e81f2c09420c8b7e4ec9cdf0b3bd63f 100644
--- a/ts2panda/ts2abc/ts2abc.cpp
+++ b/ts2panda/ts2abc/ts2abc.cpp
@@ -294,12 +294,12 @@ static panda::pandasm::Record ParseRecord(const Json::Value &record)
 
     int boundLeft = -1;
     if (record.isMember("bound_left") && record["bound_left"].isInt()) {
-        boundLeft = record["bound_left"].asUInt();
+        boundLeft = record["bound_left"].asInt();
     }
 
     int boundRight = -1;
     if (record.isMember("bound_right") && record["bound_right"].isInt()) {
-        boundRight = record["bound_right"].asUInt();
+        boundRight = record["bound_right"].asInt();
     }
 
     int lineNumber = -1;