diff --git a/ChangeLog b/ChangeLog
index 365fd9de..f829b425 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -2,6 +2,9 @@ $Id$
 
 v0.91.3		11-Feb-2007
 
+	mbselib:
+		Extra logging activated in MacroVars.
+
 	mbuser:
 		Set default editor on erased records.
 
diff --git a/lib/mbdiesel.c b/lib/mbdiesel.c
index 1f9dcc54..090dddb5 100644
--- a/lib/mbdiesel.c
+++ b/lib/mbdiesel.c
@@ -68,7 +68,7 @@ void MacroVars( const char *codes, const char *fmt, ...)
                         break;
 	}
         dieselrc = diesel(tmp1,tmp2);
-	if (dieselrc) {
+	if (dieselrc || (fmt[j] == 's')) {
 	    Syslog('!', "MacroVars error %d argument %d, macro %c type %c", dieselrc, j, codes[j], fmt[j]);
 //	    if (fmt[j] == 's')
 //		Syslogp('!', printable(va_arg(ap, char *), 0));