diff --git a/Makefile b/Makefile
index 13c38826bfca41d8407c9b35e069ecc9a08d2478..b7030b5b9410ab20d3a035bff6fa4b5fef1d8efb 100644
--- a/Makefile
+++ b/Makefile
@@ -80,6 +80,8 @@ $(BIN): subdirs $(OBJECTS)
 >$(BIN).link.stdout
 	$(F90) $(FFLAGS) $(OPTIONS) $(OBJECTS) $(LIBS) -o $(BIN) \
 1>>$(BIN).link.stdout 2>>$(BIN).link.stderr
+
+# not on the p690...
 	ldd $(BIN) >>$(BIN).link.stdout
 
 
@@ -125,12 +127,15 @@ more-output:
 	@if test -e $(BIN).link.stderr ; then more $(BIN).link.stderr ; fi
 
 .PHONY: mahone
-mahone:
+mahone::
 	cp -f Makefile.mahone Makefile.deps
 
 .PHONY: p690
-p690:
+p690::
 	cp -f Makefile.p690 Makefile.deps
+	@echo "If using WSMP, OBJECT_MODE must be 64"
+	@if test "x${OBJECT_MODE}" != x64 ; then export OBJECT_MODE=64; fi
+	@echo "OBJECT_MODE should be 64, is ${OBJECT_MODE}"
 
 # end of file