diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 00b05fce30f..589d077f0f4 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -4538,7 +4538,7 @@ in
 
   gambit = callPackage ../development/compilers/gambit { };
 
-  gcc = gcc5;
+  gcc = gcc6;
 
   wrapCCMulti = cc:
     if system == "x86_64-linux" then lowPrio (