bplist: Fix format specifier in debug message

1 files changed, 1 insertions, 1 deletions

diff --git a/src/bplist.c b/src/bplist.c
index ca2a556..a2dc957 100644
--- a/src/bplist.c
+++ b/src/bplist.c
@@ -1168,7 +1168,7 @@ static uint16_t *plist_utf8_to_utf16be(char *unistr, size_t size, size_t *items_
                         i+=1;
                 } else {
                         // invalid character
-                        PLIST_BIN_ERR("%s: invalid utf8 sequence in string at index %lu\n", __func__, i);
+                        PLIST_BIN_ERR("%s: invalid utf8 sequence in string at index %zu\n", __func__, i);
                         break;
                 }
         }