diff --git a/pkgs/tools/system/rowhammer-test/default.nix b/pkgs/tools/system/rowhammer-test/default.nix
index 728b15bb298..226ec4351ea 100644
--- a/pkgs/tools/system/rowhammer-test/default.nix
+++ b/pkgs/tools/system/rowhammer-test/default.nix
@@ -10,6 +10,8 @@ stdenv.mkDerivation {
     sha256 = "1fbfcnm5gjish47wdvikcsgzlb5vnlfqlzzm6mwiw2j5qkq0914i";
   };
 
+  NIX_CFLAGS_COMPILE = stdenv.lib.optional stdenv.isi686 "-Wno-error=format";
+
   buildPhase = "sh -e make.sh";
 
   installPhase = ''