diff --git a/src/nfa/mpv_dump.cpp b/src/nfa/mpv_dump.cpp
index b6e702ac..e731df87 100644
--- a/src/nfa/mpv_dump.cpp
+++ b/src/nfa/mpv_dump.cpp
@@ -70,9 +70,9 @@ void dumpKilo(FILE *f, const mpv *m, const mpv_kilopuff *k) {
         break;
     case MPV_VERM:
         if (!ourisprint(k->u.verm.c)) {
-            fprintf(f, "verm 0x%hhu\n", k->u.verm.c);
+            fprintf(f, "verm 0x%02x\n", k->u.verm.c);
         } else {
-            fprintf(f, "verm 0x%hhu '%c'\n", k->u.verm.c, k->u.verm.c);
+            fprintf(f, "verm 0x%02x '%c'\n", k->u.verm.c, k->u.verm.c);
         }
         break;
     case MPV_SHUFTI:
@@ -87,9 +87,9 @@ void dumpKilo(FILE *f, const mpv *m, const mpv_kilopuff *k) {
         break;
     case MPV_NVERM:
         if (!ourisprint(k->u.verm.c)) {
-            fprintf(f, "nverm 0x%hhu\n", k->u.verm.c);
+            fprintf(f, "nverm 0x%02x\n", k->u.verm.c);
         } else {
-            fprintf(f, "nverm 0x%hhu '%c'\n", k->u.verm.c, k->u.verm.c);
+            fprintf(f, "nverm 0x%02x '%c'\n", k->u.verm.c, k->u.verm.c);
         }
         break;
     default: