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-rw-r--r--libqpdf/QPDF_encryption.cc2
1 files changed, 1 insertions, 1 deletions
diff --git a/libqpdf/QPDF_encryption.cc b/libqpdf/QPDF_encryption.cc
index 772d87e0..15acf067 100644
--- a/libqpdf/QPDF_encryption.cc
+++ b/libqpdf/QPDF_encryption.cc
@@ -16,7 +16,7 @@
#include <assert.h>
#include <string.h>
-static char const padding_string[] = {
+static unsigned char const padding_string[] = {
0x28, 0xbf, 0x4e, 0x5e, 0x4e, 0x75, 0x8a, 0x41,
0x64, 0x00, 0x4e, 0x56, 0xff, 0xfa, 0x01, 0x08,
0x2e, 0x2e, 0x00, 0xb6, 0xd0, 0x68, 0x3e, 0x80,