diff --git a/pkgs/by-name/pc/pcem/package.nix b/pkgs/by-name/pc/pcem/package.nix
index 5d4980d1eaf5..e0bd9dd80dc7 100644
--- a/pkgs/by-name/pc/pcem/package.nix
+++ b/pkgs/by-name/pc/pcem/package.nix
@@ -46,7 +46,7 @@ stdenv.mkDerivation (finalAttrs: {
   ++ lib.optional withALSA "--enable-alsa";
 
   # Fix GCC 14 build
-  env.NIX_CFLAGS_COMPILE = "-Wno-error=implicit-function-declaration -Wno-error=incompatible-pointer-types";
+  env.NIX_CFLAGS_COMPILE = "-Wno-error=implicit-function-declaration -Wno-error=incompatible-pointer-types -std=gnu17";
 
   meta = {
     description = "Emulator for IBM PC computers and clones";