diff --git a/ng/ngpkg.cpp b/ng/ngpkg.cpp
index 584a2e0e..02353333 100644
--- a/ng/ngpkg.cpp
+++ b/ng/ngpkg.cpp
@@ -2329,7 +2329,7 @@ namespace netgen
         AVRational s;
         s.num = 1;
         s.den = 25;
-	  context->time_base = (AVRational){ 1, 25 };
+        context->time_base = s;
         context->gop_size = gopsize;
         context->max_b_frames = bframes;
         context->pix_fmt = PIX_FMT_YUV420P;