diff --git a/pkgs/applications/misc/abook/default.nix b/pkgs/applications/misc/abook/default.nix
index c9d35efc6cd0..2c4bc0f21284 100644
--- a/pkgs/applications/misc/abook/default.nix
+++ b/pkgs/applications/misc/abook/default.nix
@@ -19,11 +19,6 @@ stdenv.mkDerivation rec {
   nativeBuildInputs = [ pkgconfig ];
   buildInputs = [ ncurses readline ];
 
-  # Changed inline semantics in GCC5, need to export symbols for inline funcs
-  postPatch = ''
-    substituteInPlace database.c --replace inline extern
-  '';
-
   meta = {
     homepage = "http://abook.sourceforge.net/";
     description = "Text-based addressbook program designed to use with mutt mail client";