diff --git a/ffmpegdecklink.rb b/ffmpegdecklink.rb
index f1b385d..23f357f 100644
--- a/ffmpegdecklink.rb
+++ b/ffmpegdecklink.rb
@@ -45,6 +45,9 @@ class Ffmpegdecklink < Formula
   end
 
   def install
+    # Apple's new linker leads to duplicate symbol
+    ENV.append "LDFLAGS", "-Wl,-ld_classic" if DevelopmentTools.clang_build_version >= 1500
+
     args = %W[
       --prefix=#{prefix}
       --disable-shared