diff --git a/Formula/gfan.rb b/Formula/gfan.rb
index 0c1e14a..481a097 100644
--- a/Formula/gfan.rb
+++ b/Formula/gfan.rb
@@ -15,13 +15,7 @@ class Gfan < Formula
     sha256 cellar: :any_skip_relocation, x86_64_linux:  "2ac80a1fd89713e142750d8adf6f976e4249d38f58c5c2eafcfc0f6aec35793a"
   end
 
-  if OS.mac?
-    depends_on "gcc" => :build
-    fails_with :clang
-  else
-    fails_with gcc: "4"
-    fails_with gcc: "5"
-  end
+  depends_on "gcc" => :build
 
   depends_on "cddlib"
   depends_on "gmp"