--- rpm-5.4.7/rpmdb/hdrfmt.c.unitialized~	2012-03-19 14:21:14.907225418 +0100
+++ rpm-5.4.7/rpmdb/hdrfmt.c	2012-03-19 14:21:17.327228582 +0100
@@ -2048,8 +2048,10 @@ static int triggertypeTag(Header h, HE_t
     he->p.argv = xmalloc(sizeof(*he->p.argv) * he->c);
     for (i = 0; i < (unsigned) he->c; i++) {
 	for (j = 0; j < (unsigned) numNames; j++) {
-	    if (indices.ui32p[j] != i)
+	    if (indices.ui32p[j] != i) {
+		he->p.argv[i] = NULL;
 		/*@innercontinue@*/ continue;
+	    }
 
 	    /* XXX FIXME: there's memory leaks here. */
 	    if (flags.ui32p[j] & RPMSENSE_TRIGGERPREIN)