diff --git a/src/calendar.c b/src/calendar.c
index 8f5e6971..cbe04ad0 100644
--- a/src/calendar.c
+++ b/src/calendar.c
@@ -2944,9 +2944,6 @@ char const *SynthesizeTag(void)
     static char out[128];
     MD5Init(&ctx);
     MD5Update(&ctx, (unsigned char *) CurLine, strlen(CurLine));
-    MD5Update(&ctx, (unsigned char *) FileName, strlen(FileName));
-    snprintf((char *) buf, sizeof(buf), "%d", LineNo);
-    MD5Update(&ctx, buf, strlen( (char *) buf));
     MD5Final(buf, &ctx);
     snprintf(out, sizeof(out), "__syn__%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x",
             (unsigned int) buf[0], (unsigned int) buf[1],