diff --git a/pkgs/development/interpreters/python/cpython/default.nix b/pkgs/development/interpreters/python/cpython/default.nix
index 525ef8c1c6d9..d49de17ebce4 100644
--- a/pkgs/development/interpreters/python/cpython/default.nix
+++ b/pkgs/development/interpreters/python/cpython/default.nix
@@ -216,7 +216,7 @@ in with passthru; stdenv.mkDerivation {
       else
         ./3.7/fix-finding-headers-when-cross-compiling.patch
     )
-  ] ++ optionals (isPy37 || isPy38) [
+  ] ++ optionals (isPy36 || isPy37 || isPy38) [
     # Backport a fix for ctypes.util.find_library.
     ./3.7/find_library.patch
   ];