diff --git a/Library/Formula/rtmpdump.rb b/Library/Formula/rtmpdump.rb
index ce6685abf129..e99a663491d9 100644
--- a/Library/Formula/rtmpdump.rb
+++ b/Library/Formula/rtmpdump.rb
@@ -13,7 +13,7 @@ def patches
 
   def install
     ENV.j1
-    system "make", "prefix=#{prefix}", "MANDIR=#{man}", "SYS=posix install"
+    system "make", "prefix=#{prefix}", "MANDIR=#{man}", "SYS=posix", "install"
   end
 end
 __END__