Fix signed-unsigned comparison.

mapbox · Feb 21, 2019 · 8c6acbf · 8c6acbf
1 parent b36774c
commit 8c6acbf
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diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -15,6 +15,13 @@ This project adheres to [Semantic Versioning](http://semver.org/).
 ### Fixed
 
 
+## [unreleased] -
+
+### Fixed
+
+- Signed-unsigned comparison on 32 bit systems.
+
+
 ## [1.6.6] - 2018-02-20
 
 ### Fixed

diff --git a/include/protozero/pbf_reader.hpp b/include/protozero/pbf_reader.hpp
@@ -113,7 +113,7 @@ class pbf_reader {
     }
 
     void skip_bytes(pbf_length_type len) {
-        if (m_end - m_data < len) {
+        if (m_end - m_data < static_cast<ptrdiff_t>(len)) {
             throw end_of_buffer_exception{};
         }
         m_data += len;