diff --git a/lib/des/Makefile.in b/lib/des/Makefile.in
index 7e758f6dc..9bb559d11 100644
--- a/lib/des/Makefile.in
+++ b/lib/des/Makefile.in
@@ -65,9 +65,9 @@ Wall:
 des_enc.o: des_enc.c
 	@echo "Compiling des_enc.o without debug info"
 	@if test $(CC) = gcc; then\
-	  $(CC) -c $(CPPFLAGS) $(DEFS) -I../../include -I$(srcdir) -fomit-frame-pointer -O3 $(PICFLAGS) $<; \
+	  $(CC) -c $(CPPFLAGS) $(DEFS) -I../../include -I$(srcdir) -fomit-frame-pointer -O3 $(PICFLAGS) $(srcdir)/des_enc.c; \
 	else \
-	  $(CC) -c $(CPPFLAGS) $(DEFS) -I../../include -I$(srcdir) $(CFLAGS) $(PICFLAGS) $<; \
+	  $(CC) -c $(CPPFLAGS) $(DEFS) -I../../include -I$(srcdir) $(CFLAGS) $(PICFLAGS) $(srcdir)/des_enc.c; \
 	fi
 
 install: all