diff --git a/pkgs/development/tools/analysis/rr/default.nix b/pkgs/development/tools/analysis/rr/default.nix
index 26d98ed866b..84ab79879b4 100644
--- a/pkgs/development/tools/analysis/rr/default.nix
+++ b/pkgs/development/tools/analysis/rr/default.nix
@@ -13,7 +13,7 @@ stdenv.mkDerivation rec {
 
   postPatch = ''
     substituteInPlace src/Command.cc --replace '_BSD_SOURCE' '_DEFAULT_SOURCE'
-    sed '7i#include "math.h"' -i src/Scheduler.cc
+    sed '7i#include <math.h>' -i src/Scheduler.cc
     patchShebangs .
   '';