diff --git a/Library/Homebrew/extend/pathname.rb b/Library/Homebrew/extend/pathname.rb
index e94748431a..92b51f2256 100644
--- a/Library/Homebrew/extend/pathname.rb
+++ b/Library/Homebrew/extend/pathname.rb
@@ -80,9 +80,10 @@ class Pathname
   end
 
   def install_symlink_p src, new_basename=src
+    src = Pathname(src).expand_path(self)
     dst = join File.basename(new_basename)
     mkpath
-    FileUtils.ln_s Pathname(src).relative_path_from(dst.parent), dst
+    FileUtils.ln_s src.relative_path_from(dst.parent), dst
   end
   protected :install_symlink_p