diff --git a/motorExApp/Makefile b/motorExApp/Makefile
index 1dc63300..571176fe 100644
--- a/motorExApp/Makefile
+++ b/motorExApp/Makefile
@@ -3,7 +3,9 @@ include $(TOP)/configure/CONFIG
 
 #DIRS += Db
 #DIRS += NoMPF
+ifdef MPF
 #DIRS += WithMPF
 #DIRS += ipServerApp
+endif
 
 include $(TOP)/configure/RULES_DIRS