diff --git a/src/core/iomgr/pollset_multipoller_with_epoll.c b/src/core/iomgr/pollset_multipoller_with_epoll.c
index 8f62ce2954b..481bdc4ede9 100644
--- a/src/core/iomgr/pollset_multipoller_with_epoll.c
+++ b/src/core/iomgr/pollset_multipoller_with_epoll.c
@@ -72,7 +72,7 @@ static void finally_add_fd(grpc_pollset *pollset, grpc_fd *fd) {
      to this pollset whilst adding, but that should be benign. */
   GPR_ASSERT(grpc_fd_begin_poll(fd, pollset, 0, 0, &watcher) == 0);
   if (watcher.fd != NULL) {
-    ev.events = EPOLLIN | EPOLLOUT | EPOLLET;
+    ev.events = (uint32_t)(EPOLLIN | EPOLLOUT | EPOLLET);
     ev.data.ptr = fd;
     err = epoll_ctl(h->epoll_fd, EPOLL_CTL_ADD, fd->fd, &ev);
     if (err < 0) {
diff --git a/src/core/support/string.c b/src/core/support/string.c
index af0389ea832..e0ffeb8a4af 100644
--- a/src/core/support/string.c
+++ b/src/core/support/string.c
@@ -101,7 +101,7 @@ static void asciidump(dump_out *out, const char *buf, size_t len) {
     dump_out_append(out, '\'');
   }
   for (cur = beg; cur != end; ++cur) {
-    dump_out_append(out, isprint(*cur) ? *(char *)cur : '.');
+    dump_out_append(out, (char)(isprint(*cur) ? *(char *)cur : '.'));
   }
   if (!out_was_empty) {
     dump_out_append(out, '\'');
diff --git a/src/core/transport/chttp2/parsing.c b/src/core/transport/chttp2/parsing.c
index a592ce7d28b..f26f4467872 100644
--- a/src/core/transport/chttp2/parsing.c
+++ b/src/core/transport/chttp2/parsing.c
@@ -486,7 +486,7 @@ static int init_skip_frame_parser(
     transport_parsing->hpack_parser.on_header_user_data = NULL;
     transport_parsing->hpack_parser.is_boundary = is_eoh;
     transport_parsing->hpack_parser.is_eof =
-        is_eoh ? transport_parsing->header_eof : 0;
+        (gpr_uint8)(is_eoh ? transport_parsing->header_eof : 0);
   } else {
     transport_parsing->parser = skip_parser;
   }
@@ -696,7 +696,7 @@ static int init_header_frame_parser(
   transport_parsing->hpack_parser.on_header_user_data = transport_parsing;
   transport_parsing->hpack_parser.is_boundary = is_eoh;
   transport_parsing->hpack_parser.is_eof =
-      is_eoh ? transport_parsing->header_eof : 0;
+      (gpr_uint8)(is_eoh ? transport_parsing->header_eof : 0);
   if (!is_continuation && (transport_parsing->incoming_frame_flags &
                            GRPC_CHTTP2_FLAG_HAS_PRIORITY)) {
     grpc_chttp2_hpack_parser_set_has_priority(&transport_parsing->hpack_parser);