diff --git a/Formula/rtmpdump.rb b/Formula/rtmpdump.rb
index ce6685abf12..e99a663491d 100644
--- a/Formula/rtmpdump.rb
+++ b/Formula/rtmpdump.rb
@@ -13,7 +13,7 @@ class Rtmpdump <Formula
 
   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__