diff --git a/pkgs/by-name/si/sirius/package.nix b/pkgs/by-name/si/sirius/package.nix
index ee6052cf09c1..c09b9360419e 100644
--- a/pkgs/by-name/si/sirius/package.nix
+++ b/pkgs/by-name/si/sirius/package.nix
@@ -85,6 +85,11 @@ stdenv.mkDerivation rec {
 
   propagatedBuildInputs = [ mpi ];
 
+  CXXFLAGS = [
+    # GCC 13: error: 'uintptr_t' in namespace 'std' does not name a type
+    "-include cstdint"
+  ];
+
   cmakeFlags = [
     "-DUSE_SCALAPACK=ON"
     "-DBUILD_TESTING=ON"