diff --git a/res/Makefile b/res/Makefile
index 39d079e0f9afbc15aaf153f9630cf02a6c8e23d2..a09eae179103532b2947666b8effa7c3ce38af0d 100755
--- a/res/Makefile
+++ b/res/Makefile
@@ -58,7 +58,16 @@ endif
 depend: .depend
 
 .depend:
-	../mkdep $(CFLAGS) `ls *.c`
+	@if ! which mpg123 &>/dev/null ; then \
+		echo "*** You don't have mpg123 installed. You're going to need ***";\
+		echo "***       it if you want MusicOnHold                      ***";\
+	elif ! mpg123 --longhelp 2>&1 | grep .59r &>/dev/null ; then \
+			echo "*************************************************************";\
+			echo "*** You have the WRONG version of mpg123... you need .59r ***";\
+			echo "*** Use 'make mpg123' to get the right verison            ***";\
+			echo "*************************************************************";\
+ 	fi
+	../mkdep $(CFLAGS) `ls *.c`	
 
 env:
 	env