diff --git a/Library/Homebrew/formula.rb b/Library/Homebrew/formula.rb
index f56c1564ad..d4654495cd 100644
--- a/Library/Homebrew/formula.rb
+++ b/Library/Homebrew/formula.rb
@@ -227,7 +227,7 @@ class Formula
     llvm = self.class.fails_with_llvm_reason
     if llvm
       if llvm.build
-        MacOS.llvm_build_version <= llvm.build
+        MacOS.llvm_build_version <= llvm.build.to_i
       else
         true
       end