diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index aeeabc36e..da11515bb 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -437,6 +437,10 @@ macos:
   needs: []
   variables:
     GIT_SUBMODULE_STRATEGY: normal
+    # libpcre2 gets built as a subproject, but the default Clang options on
+    # macOS limit string lengths to 4095B — pcre2_error.c has a string of length
+    # 4380B
+    CFLAGS: '-Wno-overlength-strings'
   before_script:
     - bash .gitlab-ci/show-execution-environment.sh
     - pip3 install --user meson==0.60.1
diff --git a/glib/gstdio.c b/glib/gstdio.c
index f48263d0a..f2d58134e 100644
--- a/glib/gstdio.c
+++ b/glib/gstdio.c
@@ -319,6 +319,8 @@ _g_win32_fill_privatestat (const struct __stat64            *statbuf,
                            DWORD                             reparse_tag,
                            GWin32PrivateStat                *buf)
 {
+  gint32 nsec;
+
   buf->st_dev = statbuf->st_dev;
   buf->st_ino = statbuf->st_ino;
   buf->st_mode = statbuf->st_mode;
@@ -331,9 +333,12 @@ _g_win32_fill_privatestat (const struct __stat64            *statbuf,
 
   buf->reparse_tag = reparse_tag;
 
-  buf->st_ctim.tv_sec = _g_win32_filetime_to_unix_time (&handle_info->ftCreationTime, &buf->st_ctim.tv_nsec);
-  buf->st_mtim.tv_sec = _g_win32_filetime_to_unix_time (&handle_info->ftLastWriteTime, &buf->st_mtim.tv_nsec);
-  buf->st_atim.tv_sec = _g_win32_filetime_to_unix_time (&handle_info->ftLastAccessTime, &buf->st_atim.tv_nsec);
+  buf->st_ctim.tv_sec = _g_win32_filetime_to_unix_time (&handle_info->ftCreationTime, &nsec);
+  buf->st_ctim.tv_nsec = nsec;
+  buf->st_mtim.tv_sec = _g_win32_filetime_to_unix_time (&handle_info->ftLastWriteTime, &nsec);
+  buf->st_mtim.tv_nsec = nsec;
+  buf->st_atim.tv_sec = _g_win32_filetime_to_unix_time (&handle_info->ftLastAccessTime, &nsec);
+  buf->st_atim.tv_nsec = nsec;
 }
 
 /* Read the link data from a symlink/mountpoint represented
diff --git a/meson.build b/meson.build
index 00d38cbec..587197638 100644
--- a/meson.build
+++ b/meson.build
@@ -484,6 +484,7 @@ if cc.get_id() == 'gcc' or cc.get_id() == 'clang'
     '-Werror=declaration-after-statement',
     '-Werror=implicit-function-declaration',
     '-Werror=missing-prototypes',
+    '-Werror=pointer-sign',
   ]
   warning_cxx_args = warning_common_args
   warning_objc_args = warning_c_args