diff --git a/Library/Homebrew/formula.rb b/Library/Homebrew/formula.rb
index 10ff5b4cc0..8f13a0ff48 100644
--- a/Library/Homebrew/formula.rb
+++ b/Library/Homebrew/formula.rb
@@ -1630,7 +1630,7 @@ class Formula
   def std_pip_args(prefix: self.prefix, build_isolation: false)
     args = ["--verbose", "--no-deps", "--no-binary=:all:", "--ignore-installed",
             "--use-feature=no-binary-enable-wheel-cache"]
-    args << "--prefix=#{prefix}" if prefix.present?
+    args << "--prefix=#{prefix}" if prefix
     args << "--no-build-isolation" unless build_isolation
     args
   end