--- PDAL-1.7.1-src.orig/vendor/arbiter/arbiter.cpp
+++ PDAL-1.7.1-src/vendor/arbiter/arbiter.cpp
@@ -4120,7 +4120,7 @@
 
     uint8_t data[64];
     uint32_t datalen;
-    std::size_t bitlen;
+    unsigned long long bitlen;
     uint32_t state[8];
 };