diff --git a/gio/gfile.c b/gio/gfile.c
index 31da0b05e..a78737773 100644
--- a/gio/gfile.c
+++ b/gio/gfile.c
@@ -77,6 +77,13 @@
 #include "gioerror.h"
 #include "glibintl.h"
 
+/* Linux defines loff_t as a way to simplify the offset types for calls like
+ * splice() and copy_file_range(). BSD has copy_file_range() but doesn’t define
+ * loff_t. Abstract that. */
+#ifndef HAVE_LOFF_T
+typedef off_t loff_t;
+#endif
+
 
 /**
  * SECTION:gfile
diff --git a/meson.build b/meson.build
index 44284fc10..1d3754abb 100644
--- a/meson.build
+++ b/meson.build
@@ -828,6 +828,10 @@ if cc.has_header_symbol('dlfcn.h', 'RTLD_NEXT', args: '-D_GNU_SOURCE')
   glib_conf.set('HAVE_RTLD_NEXT', 1)
 endif
 
+if cc.has_type('loff_t', prefix: '#include <sys/types.h>')
+  glib_conf.set('HAVE_LOFF_T', 1)
+endif
+
 # Check whether to use statfs or statvfs
 # Some systems have both statfs and statvfs, pick the most "native" for these
 if have_func_statfs and have_func_statvfs