diff --git a/libfprint/fpi-compat.h b/libfprint/fpi-compat.h
index 5480eb52..6582fb5a 100644
--- a/libfprint/fpi-compat.h
+++ b/libfprint/fpi-compat.h
@@ -39,6 +39,17 @@ G_DEFINE_AUTOPTR_CLEANUP_FUNC (FpDeviceClass, g_type_class_unref);
 G_DEFINE_AUTOPTR_CLEANUP_FUNC (GDate, g_date_free);
 #endif
 
+#if !GLIB_CHECK_VERSION (2, 68, 0)
+#define g_memdup2(data, size) g_memdup ((data), (size))
+#else
+#define g_memdup2(data, size)        \
+  (G_GNUC_EXTENSION ({               \
+    G_GNUC_BEGIN_IGNORE_DEPRECATIONS \
+      g_memdup2 ((data), (size));    \
+    G_GNUC_END_IGNORE_DEPRECATIONS   \
+  }))
+#endif
+
 #if  __GNUC__ > 10 || (__GNUC__ == 10 && __GNUC_MINOR__ >= 1)
 #define FP_GNUC_ACCESS(m, p, s) __attribute__((access (m, p, s)))
 #else