diff --git a/Formula/ec2-api-tools.rb b/Formula/ec2-api-tools.rb
index 96dbaa94354..05d9c99a100 100644
--- a/Formula/ec2-api-tools.rb
+++ b/Formula/ec2-api-tools.rb
@@ -10,6 +10,6 @@ class Ec2ApiTools < AmazonWebServicesFormula
   end
 
   def caveats
-    standard_instructions "EC2_HOME", prefix
+    standard_instructions "EC2_HOME"
   end
 end