--- xpra-0.17.5/xpra/codecs/dec_avcodec2/decoder.pyx~	2016-05-26 17:47:10.000000000 +0200
+++ xpra-0.17.5/xpra/codecs/dec_avcodec2/decoder.pyx	2018-04-29 19:24:10.048722014 +0200
@@ -65,7 +65,7 @@
     AVPixelFormat AV_PIX_FMT_GBRP
 
 cdef extern from "libavcodec/avcodec.h":
-    int CODEC_FLAG2_FAST
+    int AV_CODEC_FLAG2_FAST
 
     ctypedef struct AVFrame:
         uint8_t **data
@@ -361,7 +361,7 @@
         self.codec_ctx.thread_safe_callbacks = 1
         self.codec_ctx.thread_type = 2      #FF_THREAD_SLICE: allow more than one thread per frame
         self.codec_ctx.thread_count = 0     #auto
-        self.codec_ctx.flags2 |= CODEC_FLAG2_FAST   #may cause "no deblock across slices" - which should be fine
+        self.codec_ctx.flags2 |= AV_CODEC_FLAG2_FAST   #may cause "no deblock across slices" - which should be fine
         r = avcodec_open2(self.codec_ctx, self.codec, NULL)
         if r<0:
             log.error("could not open codec: %s", self.av_error_str(r))