diff --git a/README.md b/README.md
index b607c20..8553114 100644
--- a/README.md
+++ b/README.md
@@ -871,7 +871,7 @@ auto res = cli.Post(
 httplib::Client cli(url, port);
 
 // prints: 0 / 000 bytes => 50% complete
-auto res = cli.Get("/", [](uint64_t len, uint64_t total) {
+auto res = cli.Get("/", [](size_t len, size_t total) {
   printf("%lld / %lld bytes => %d%% complete\n",
     len, total,
     (int)(len*100/total));
diff --git a/httplib.h b/httplib.h
index b1c778a..16aced1 100644
--- a/httplib.h
+++ b/httplib.h
@@ -18,10 +18,10 @@
 #error                                                                         \
     "cpp-httplib doesn't support 32-bit Windows. Please use a 64-bit compiler."
 #elif defined(__SIZEOF_POINTER__) && __SIZEOF_POINTER__ < 8
-#error                                                                         \
+#warning                                                                       \
     "cpp-httplib doesn't support 32-bit platforms. Please use a 64-bit compiler."
 #elif defined(__SIZEOF_SIZE_T__) && __SIZEOF_SIZE_T__ < 8
-#error                                                                         \
+#warning                                                                       \
     "cpp-httplib doesn't support platforms where size_t is less than 64 bits."
 #endif