diff --git a/generator/mavgen_javascript.py b/generator/mavgen_javascript.py
index e482f47bb..79dbcfb1d 100644
--- a/generator/mavgen_javascript.py
+++ b/generator/mavgen_javascript.py
@@ -846,7 +846,7 @@ def generate_mavlink_class(outf, msgs, xml):
     var messageChecksum2 = ${MAVHEAD}.x25Crc([decoder.crc_extra], messageChecksum); 
  
     if ( receivedChecksum != messageChecksum2 ) { 
-        throw new Error('invalid MAVLink CRC in msgID ' +msgId+ ', got 0x' + receivedChecksum + ' checksum, calculated payload checksum as 0x'+messageChecksum2 ); 
+        throw new Error('invalid MAVLink CRC in msgID ' +msgId+ ', got ' + receivedChecksum + ' checksum, calculated payload checksum as '+messageChecksum2 );
     }
  
     // now check the signature... 
diff --git a/generator/mavgen_javascript_stable.py b/generator/mavgen_javascript_stable.py
index aed7c3b00..27dcea3ba 100644
--- a/generator/mavgen_javascript_stable.py
+++ b/generator/mavgen_javascript_stable.py
@@ -570,7 +570,7 @@ def generate_mavlink_class(outf, msgs, xml):
     messageChecksum = ${MAVHEAD}.x25Crc([decoder.crc_extra], messageChecksum);
     
     if ( receivedChecksum != messageChecksum ) {
-        throw new Error('invalid MAVLink CRC in msgID ' +msgId+ ', got 0x' + receivedChecksum + ' checksum, calculated payload checksum as 0x'+messageChecksum );
+        throw new Error('invalid MAVLink CRC in msgID ' +msgId+ ', got ' + receivedChecksum + ' checksum, calculated payload checksum as '+messageChecksum );
     }
 
     var paylen = jspack.CalcLength(decoder.format);