diff --git a/ndn-cpp/c/encoding/binary-xml-structure-decoder.c b/ndn-cpp/c/encoding/binary-xml-structure-decoder.c
index 4596910..603d07d 100644
--- a/ndn-cpp/c/encoding/binary-xml-structure-decoder.c
+++ b/ndn-cpp/c/encoding/binary-xml-structure-decoder.c
@@ -31,7 +31,7 @@
 }
 
 ndn_Error ndn_BinaryXmlStructureDecoder_findElementEnd
-  (struct ndn_BinaryXmlStructureDecoder *self, unsigned char *input, unsigned int inputLength) 
+  (struct ndn_BinaryXmlStructureDecoder *self, uint8_t *input, unsigned int inputLength) 
 {
   if (self->gotElementEnd)
     // Someone is calling when we already got the end.