diff --git a/demod/mod/meisei100mod.c b/demod/mod/meisei100mod.c
index 1c24c1b..a23c090 100644
--- a/demod/mod/meisei100mod.c
+++ b/demod/mod/meisei100mod.c
@@ -74,6 +74,7 @@ Variante 2 (iMS-100 ?)
 0x11..0x12  31xx, xx=C1(ims100?),A2(rs11?)
 0x17..0x18  16 bit  1024-counter yyxx, +0x400=1024; rollover synchron zu ms-counter, nach rollover auch +0x300=768
 0x1B..0x1D  HEADER  0xFB6230
+0x20..0x21  16 bit  GPS-vV * 1.944e1 (knots)
 0x22..0x23  yy00..yy03 (yy00: GPS PRN?)
 
 
@@ -1014,6 +1015,8 @@ int main(int argc, char **argv) {
                                     if (ver_jsn && *ver_jsn != '\0') printf(", \"version\": \"%s\"", ver_jsn);
                                     printf(" }\n");
                                     printf("\n");
+
+                                    gpx.frm0_valid = 0;
                                 }
 
                             }