diff --git a/pkgs/servers/tvheadend/default.nix b/pkgs/servers/tvheadend/default.nix
index dd66259eed6f..7fad204a0189 100644
--- a/pkgs/servers/tvheadend/default.nix
+++ b/pkgs/servers/tvheadend/default.nix
@@ -25,6 +25,8 @@ in stdenv.mkDerivation {
 
   enableParallelBuilding = true;
 
+  NIX_CFLAGS_COMPILE = "-Wno-error=format-truncation";
+
   # disable dvbscan, as having it enabled causes a network download which
   # cannot happen during build.
   configureFlags = [