diff --git a/makefile_slinux b/makefile_slinux
index f5955672..1cf015b6 100644
--- a/makefile_slinux
+++ b/makefile_slinux
@@ -17,7 +17,7 @@ CC       = gcc
 CFLAGS = -I$(HDFROOT)/include  -DNXXML -DHDF4 -DHDF5 $(NI) \
        -Ipsi/hardsup  -I. \
        -Werror -DCYGNUS -DNONINTF -g $(DFORTIFY) \
-       -Wall -Wno-unused -Wno-comment -Wno-switch 
+       -Wall -Wno-unused -Wunused-value -Wno-comment -Wno-switch 
 
 BINTARGET = bin
 EXTRA=nintf.o