diff --git a/Library/Homebrew/linkage_checker.rb b/Library/Homebrew/linkage_checker.rb
index 31b6c0e3cc..baa99fa1dd 100644
--- a/Library/Homebrew/linkage_checker.rb
+++ b/Library/Homebrew/linkage_checker.rb
@@ -75,28 +75,19 @@ class LinkageChecker
     [issues, unexpected_broken_dylibs].flatten.any?(&:present?)
   end
 
-  def allowed_missing_lib?(lib)
-    raise TypeError, "Library must be a string; got a #{lib.class} (#{lib})" unless lib.is_a? String
-
-    # lib:   Full path to the missing library
-    #        Ex.: /home/linuxbrew/.linuxbrew/lib/libsomething.so.1
-    # x -    Name of or a pattern for a library, linkage to which is allowed to be missing.
-    #        Ex. 1: "libONE.so.1"
-    #        Ex. 2: %r{(libONE|libTWO)\.so}
-    @formula.class.allowed_missing_libraries.any? do |x|
-      case x
-      when Regexp
-        x.match? lib
-      when String
-        lib.include? x
-      end
-    end
-  end
-
   def unexpected_broken_dylibs
     return @unexpected_broken_dylibs if @unexpected_broken_dylibs
 
-    @unexpected_broken_dylibs = @broken_dylibs.reject { |lib| allowed_missing_lib? lib }
+    @unexpected_broken_dylibs = @broken_dylibs.reject do |broken_lib|
+      @formula.class.allowed_missing_libraries.any? do |allowed_missing_lib|
+        case allowed_missing_lib
+        when Regexp
+          allowed_missing_lib.match? broken_lib
+        when String
+          broken_lib.include? allowed_missing_lib
+        end
+      end
+    end
   end
 
   def broken_dylibs_with_expectations