diff --git a/Makefile b/Makefile
index c5d405b..c799973 100644
--- a/Makefile
+++ b/Makefile
@@ -4,7 +4,7 @@ PROJNAME=equi
 CFILES=equi.c
 PBTDIR=platform-build-tools
 PERSFILE=PERS.DAT
-DFLAGS=
+DFLAGS=-DPERSIST_FILE="\"$(PERSFILE)\""
 
 desktopcc: perscopy
 	cc -std=c89 -Os -o $(PROJNAME) $(CFILES) $(DFLAGS)