Index: lib/libsysdecode/flags.c
===================================================================
--- lib/libsysdecode/flags.c
+++ lib/libsysdecode/flags.c
@@ -657,7 +657,16 @@
 bool
 sysdecode_mmap_prot(FILE *fp, int prot, int *rem)
 {
+	int protm;
+	bool ret;
 
+	protm = PROT_MAX_EXTRACT(prot);
+	if (protm != 0) {
+		fputs("PROT_MAX(", fp);
+		ret = print_mask_int(fp, mmapprot, protm, rem);
+		fputs(")", fp);
+		return (ret);
+	}
 	return (print_mask_int(fp, mmapprot, prot, rem));
 }