diff --git a/utils/Makefile b/utils/Makefile
index 0ef56fb3..c5b2e6eb 100644
--- a/utils/Makefile
+++ b/utils/Makefile
@@ -13,7 +13,7 @@
 ##LFLAGS = -L../hardsup
 #------------ for Linux
 CC     = gcc
-CFLAGS = -g -I. -I../hardsup
+CFLAGS = -g -I. -I../hardsup -DLinux
 BIN    = linux.i686
 LFLAGS = -L../hardsup -L/usr/X11R6/lib
 #------------
@@ -52,8 +52,8 @@ $(HOME)/bin/$(BIN)/el734_test: el734_test.c
 $(HOME)/bin/$(BIN)/el737: el737.c
 	@ echo "el737 needs Motif library. Not yet found on linux"
 ##	rm -f $(HOME)/bin/$(BIN)/el737
-##	$(CC) $(CFLAGS) -o $(HOME)/bin/$(BIN)/el737 \
-##                  el737.c $(LFLAGS) -lhlib -lX11
+##	$(CC) $(CFLAGS) -I/usr/X11R6/include -o $(HOME)/bin/$(BIN)/el737 \
+##                  el737.c $(LFLAGS) -lhlib -lXm -lXt -lX11
 
 #----------------------------------------------------------