diff --git a/ndn-cpp/c/encoding/binary-xml-interest.c b/ndn-cpp/c/encoding/binary-xml-interest.c
index ee20f05..a43ce3b 100644
--- a/ndn-cpp/c/encoding/binary-xml-interest.c
+++ b/ndn-cpp/c/encoding/binary-xml-interest.c
@@ -21,7 +21,7 @@
     return error;
   
   // TODO: Do we want to order the components (except for ANY)?
-  unsigned int i;
+  size_t i;
   for (i = 0; i < exclude->nEntries; ++i) {
     struct ndn_ExcludeEntry *entry = &exclude->entries[i];
     
@@ -61,7 +61,7 @@
     if (gotExpectedTag) {
       // Component
       uint8_t *component;
-      unsigned int componentLen;
+      size_t componentLen;
       if ((error = ndn_BinaryXmlDecoder_readBinaryDTagElement(decoder, ndn_BinaryXml_DTag_Component, 0, &component, &componentLen)))
         return error;
     
@@ -97,7 +97,7 @@
     if (gotExpectedTag) {
       // Skip the Bloom and treat it as Any.
       uint8_t *value;
-      unsigned int valueLen;
+      size_t valueLen;
       if ((error = ndn_BinaryXmlDecoder_readBinaryDTagElement(decoder, ndn_BinaryXml_DTag_Bloom, 0, &value, &valueLen)))
         return error;