diff --git a/gf.cabal b/gf.cabal
index a03d80815..28184ec79 100644
--- a/gf.cabal
+++ b/gf.cabal
@@ -318,7 +318,7 @@ Executable gf
   ghc-options: -threaded -fwarn-unused-imports
 
   if impl(ghc>=7.0)
-    ghc-options: -rtsopts
+    ghc-options: -rtsopts -with-rtsopts=-I5
     if impl(ghc<7.8)
       ghc-options: -with-rtsopts=-K64M