diff --git a/src/builtin_set_color.cpp b/src/builtin_set_color.cpp
index 5d6ee22d1..22c9d9d2e 100644
--- a/src/builtin_set_color.cpp
+++ b/src/builtin_set_color.cpp
@@ -179,6 +179,7 @@ maybe_t<int> builtin_set_color(parser_t &parser, io_streams_t &streams, wchar_t
     outputter_t outp;
 
     if (bold && enter_bold_mode) {
+        // These casts are needed to work with different curses implementations.
         writembs_nofail(outp, tparm(const_cast<char *>(enter_bold_mode)));
     }
 
diff --git a/src/event.cpp b/src/event.cpp
index 0b11cfcbd..4868c917f 100644
--- a/src/event.cpp
+++ b/src/event.cpp
@@ -387,7 +387,7 @@ void event_print(io_streams_t &streams, maybe_t<event_type_t> type_filter) {
 
         if (!last_type || *last_type != evt->desc.type) {
             if (last_type) streams.out.append(L"\n");
-            last_type = static_cast<event_type_t>(evt->desc.type);
+            last_type = evt->desc.type;
             streams.out.append_format(L"Event %ls\n", event_name_for_type(*last_type));
         }
         switch (evt->desc.type) {
diff --git a/src/wutil.cpp b/src/wutil.cpp
index 6a2de70a1..5fb63abcc 100644
--- a/src/wutil.cpp
+++ b/src/wutil.cpp
@@ -84,7 +84,7 @@ bool wreaddir_resolving(DIR *dir, const wcstring &dir_path, wcstring &out_name,
         if (stat(fullpath.c_str(), &buf) != 0) {
             is_dir = false;
         } else {
-            is_dir = static_cast<bool>(S_ISDIR(buf.st_mode));
+            is_dir = S_ISDIR(buf.st_mode);
         }
     }
     *out_is_dir = is_dir;