diff --git a/Rubi/Rubi.m b/Rubi/Rubi.m
index 022592c..197477e 100644
--- a/Rubi/Rubi.m
+++ b/Rubi/Rubi.m
@@ -94,6 +94,8 @@
 
 
 Unprotect[Int];  Clear[Int];  Clear[Unintegrable];  Clear[CannotIntegrate];
+(*auto-highlighting for Int[]*)
+SyntaxInformation[Int] = {"LocalVariables" -> {"Integrate", {2, 2}}}; 
 
 (* The order of loading the rule-files below is crucial to ensure a functional Rubi integrator! *)
 LoadRules[$utilityPackage];