diff --git a/diffscan.c b/diffscan.c
index 597edb90..22cf3b74 100644
--- a/diffscan.c
+++ b/diffscan.c
@@ -70,7 +70,7 @@ int MakeDiffScan(SConnection *pCon, SicsInterp *pSics, void *pData,
   pNew->pDes->SaveStatus = SaveDiffScan;
 
   if(argc > 1) {
-    status = AddCommand(pSics,argv[2],
+    status = AddCommand(pSics,argv[1],
 			DiffScanWrapper,
 			KillDiffScan,
 			pNew);