diff --git a/makefile_linux b/makefile_linux
index ce339df5..3bfe0620 100644
--- a/makefile_linux
+++ b/makefile_linux
@@ -13,20 +13,11 @@ FORTIFYOBJ=strdup.o fortify.o
 #NI= -DHAVENI
 #NIOBJ= nigpib.o
 #NILIB=-lgpibenet
-#==========================================================================
-# comment or uncomment if a difrac version is required
-# Do not forget to remove or add comments to ofac.c as well if changes
-# were made here.
- 
-#DIFOBJ=difrac.o  -Ldifrac -ldif 
-#DIFIL= difrac.o
-#==========================================================================
-
 #----------------select proper Makefile
 MFLAGS= -f makefile_linux
 
 CC       = gcc
-CFLAGS = -I$(HDFROOT)/include -DHDF4 -DHDF5 $(NI) -Ipsi/hardsup -I.y \
+CFLAGS = -I$(HDFROOT)/include -DHDF4 -DHDF5 $(NI) -Ipsi/hardsup -I. \
        -fwritable-strings -DCYGNUS -DNONINTF -g $(DFORTIFY)
 
 BINTARGET = bin