diff --git a/pkgs/development/libraries/rapidjson/default.nix b/pkgs/development/libraries/rapidjson/default.nix
index 5e9a11d42512c70..8e6b3b44491e11d 100644
--- a/pkgs/development/libraries/rapidjson/default.nix
+++ b/pkgs/development/libraries/rapidjson/default.nix
@@ -13,6 +13,9 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [ pkgconfig cmake ];
 
+  # detected by gcc7
+  NIX_CFLAGS_COMPILE = [ "-Wno-error=implicit-fallthrough" ];
+
   meta = with lib; {
     description = "Fast JSON parser/generator for C++ with both SAX/DOM style API";
     homepage = "http://rapidjson.org/";