diff --git a/pkgs/os-specific/linux/lttng-modules/default.nix b/pkgs/os-specific/linux/lttng-modules/default.nix
index 6a8d645247aa..669f45562cb4 100644
--- a/pkgs/os-specific/linux/lttng-modules/default.nix
+++ b/pkgs/os-specific/linux/lttng-modules/default.nix
@@ -21,8 +21,6 @@ stdenv.mkDerivation rec {
 
   hardeningDisable = [ "pic" ];
 
-  env.NIX_CFLAGS_COMPILE = "-Wno-error=implicit-function-declaration";
-
   makeFlags = kernelModuleMakeFlags ++ [
     "KERNELDIR=${kernel.dev}/lib/modules/${kernel.modDirVersion}/build"
     "INSTALL_MOD_PATH=${placeholder "out"}"