diff --git a/Formula/gmtl.rb b/Formula/gmtl.rb
index 60e61fa020f..76652be38e8 100644
--- a/Formula/gmtl.rb
+++ b/Formula/gmtl.rb
@@ -17,7 +17,7 @@ class Gmtl < Formula
   end
 
   def install
-    system "scons", "install", "prefix=#{prefix}"
+    scons "install", "prefix=#{prefix}"
   end
 end