diff --git a/configure/RULES.Db b/configure/RULES.Db
index e4cf638c5..cbd7b482f 100644
--- a/configure/RULES.Db
+++ b/configure/RULES.Db
@@ -24,8 +24,9 @@ vpath %.acs $(USR_VPATH) $(GENERIC_SRC_DIRS) $(COMMON_DIR)
 
 # dbExpand
 INSTALL_DBDFLAGS += -I $(INSTALL_LOCATION)/dbd
+INSTALL_DBFLAGS += -I $(INSTALL_LOCATION)/db
 DBDFLAGS = $(USR_DBDFLAGS) -I . -I .. $(INSTALL_DBDFLAGS) $(RELEASE_DBDFLAGS)
-DBFLAGS = $($*_DBFLAGS) $(USR_DBFLAGS) -I. -I.. $(RELEASE_DBFLAGS)
+DBFLAGS = $($*_DBFLAGS) $(USR_DBFLAGS) -I. -I.. $(INSTALL_DBFLAGS) $(RELEASE_DBFLAGS)
 
 #####################################################  Targets