diff --git a/Library/Homebrew/extend/os/mac/extend/ENV/super.rb b/Library/Homebrew/extend/os/mac/extend/ENV/super.rb
index 4521367835f51428e78abf784a3258653edfd527..eac85767d73049377eadee0fa8fa8e0c6430a17d 100644
--- a/Library/Homebrew/extend/os/mac/extend/ENV/super.rb
+++ b/Library/Homebrew/extend/os/mac/extend/ENV/super.rb
@@ -113,7 +113,6 @@ module Superenv
   def setup_build_environment(formula = nil)
     generic_setup_build_environment(formula)
     self["HOMEBREW_SDKROOT"] = effective_sysroot
-    self["SDKROOT"] = MacOS.sdk_path if MacOS.sdk_path
 
     # Filter out symbols known not to be defined since GNU Autotools can't
     # reliably figure this out with Xcode 8 and above.