diff --git a/libavutil/common.h b/libavutil/common.h
index bbcca7575f7be3cd46f1804b4d26552253cb1cf0..6887cf02f9c71909ddea32fd6a8e1364258aada1 100644
--- a/libavutil/common.h
+++ b/libavutil/common.h
@@ -77,6 +77,14 @@
 #endif
 #endif
 
+#ifndef av_flatten
+#if defined(__GNUC__) && (__GNUC__ > 4 || __GNUC__ == 4 && __GNUC_MINOR__ > 0)
+#    define av_flatten __attribute__((flatten))
+#else
+#    define av_flatten
+#endif
+#endif
+
 #ifndef attribute_deprecated
 #if AV_GCC_VERSION_AT_LEAST(3,1)
 #    define attribute_deprecated __attribute__((deprecated))