1 files changed, 1 insertions, 1 deletions

diff --git a/Concat.hs b/Concat.hs
index f822bcf..c10301a 100644
--- a/Concat.hs
+++ b/Concat.hs
@@ -1,4 +1,4 @@
-import System( getArgs )
+import System.Environment( getArgs )
 import Text.Printf
 import Parse
 import ProofGraph