thodg/libgit2

diff --git a/ci/build.sh b/ci/build.sh
index 0dd8f67..ddd9cb6 100755
--- a/ci/build.sh
+++ b/ci/build.sh
@@ -29,7 +29,7 @@ echo "## Configuring build environment"
 echo "##############################################################################"
 
 echo cmake ${SOURCE_DIR} -DBUILD_EXAMPLES=ON ${CMAKE_OPTIONS}
-cmake ${SOURCE_DIR} -DBUILD_EXAMPLES=ON -DBUILD_FUZZERS=ON -DUSE_STANDALONE_FUZZERS=ON ${CMAKE_OPTIONS}
+cmake ${SOURCE_DIR} -DENABLE_WERROR=ON -DBUILD_EXAMPLES=ON -DBUILD_FUZZERS=ON -DUSE_STANDALONE_FUZZERS=ON ${CMAKE_OPTIONS}
 
 echo ""
 echo "##############################################################################"
diff --git a/src/odb.c b/src/odb.c
index 919a951..f1c7ebc 100644
--- a/src/odb.c
+++ b/src/odb.c
@@ -1384,8 +1384,8 @@ static int git_odb_stream__invalid_length(
 {
 	giterr_set(GITERR_ODB,
 		"cannot %s - "
-		"Invalid length. %"PRIdZ" was expected. The "
-		"total size of the received chunks amounts to %"PRIdZ".",
+		"Invalid length. %"PRId64" was expected. The "
+		"total size of the received chunks amounts to %"PRId64".",
 		action, stream->declared_size, stream->received_bytes);
 
 	return -1;