diff --git a/src/Makefile b/src/Makefile
index c0df88ec..b530cdb5 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -54,7 +54,7 @@ endif
 
 CCOPT= $(CFLAGS) $(ARCH) $(PROF)
 
-PREFIX= /usr/local
+PREFIX=? /usr/local
 INSTALL_BIN= $(PREFIX)/bin
 INSTALL= cp -pf