diff --git a/src/util/glibcompat.c b/src/util/glibcompat.c
index 9fba54cb79717661d9b968858821729325e2e0e1..9710766a2d3fc6723b5e3332b90be55917761404 100644
--- a/src/util/glibcompat.c
+++ b/src/util/glibcompat.c
@@ -23,9 +23,22 @@
 
 #include "glibcompat.h"
 
+#undef g_fsync
 #undef g_strdup_printf
 #undef g_strdup_vprintf
-#undef g_fsync
+
+
+/* Drop when min glib >= 2.63.0 */
+gint
+vir_g_fsync(gint fd)
+{
+#ifdef G_OS_WIN32
+  return _commit(fd);
+#else
+  return fsync(fd);
+#endif
+}
+
 
 /* Due to a bug in glib, g_strdup_printf() nor g_strdup_vprintf()
  * abort on OOM.  It's fixed in glib's upstream. Provide our own
@@ -53,15 +66,3 @@ vir_g_strdup_vprintf(const char *msg, va_list args)
     abort();
   return ret;
 }
-
-
-/* Drop when min glib >= 2.63.0 */
-gint
-vir_g_fsync(gint fd)
-{
-#ifdef G_OS_WIN32
-  return _commit(fd);
-#else
-  return fsync(fd);
-#endif
-}
diff --git a/src/util/glibcompat.h b/src/util/glibcompat.h
index 7878ad24ed16b237581e10dbf0431f28bbb0cacd..ce31a4de0432768432a4dcac2c4e57fe16fae8dc 100644
--- a/src/util/glibcompat.h
+++ b/src/util/glibcompat.h
@@ -21,11 +21,11 @@
 #include <glib.h>
 #include <glib/gstdio.h>
 
+gint vir_g_fsync(gint fd);
 char *vir_g_strdup_printf(const char *msg, ...)
     G_GNUC_PRINTF(1, 2);
 char *vir_g_strdup_vprintf(const char *msg, va_list args)
     G_GNUC_PRINTF(1, 0);
-gint vir_g_fsync(gint fd);
 
 #if !GLIB_CHECK_VERSION(2, 64, 0)
 # define g_strdup_printf vir_g_strdup_printf