diff --git a/makefile_slinux b/makefile_slinux
index 1cf015b6..b896439b 100644
--- a/makefile_slinux
+++ b/makefile_slinux
@@ -15,7 +15,7 @@ include sllinux_def
 
 CC       = gcc
 CFLAGS = -I$(HDFROOT)/include  -DNXXML -DHDF4 -DHDF5 $(NI) \
-       -Ipsi/hardsup  -I. \
+       -Ipsi/hardsup  -I. -MMD \
        -Werror -DCYGNUS -DNONINTF -g $(DFORTIFY) \
        -Wall -Wno-unused -Wunused-value -Wno-comment -Wno-switch 
 
@@ -32,7 +32,7 @@ LIBS =   -L$(HDFROOT)/lib $(SUBLIBS) $(NILIB)\
 
 include make_gen
 
-
+-include $(OBJ:.o=.d)