diff --git a/usr.bin/bmake/Makefile b/usr.bin/bmake/Makefile
index 6c6d8c2..22fec7a 100644
--- a/usr.bin/bmake/Makefile
+++ b/usr.bin/bmake/Makefile
@@ -5,7 +5,7 @@
 
 .sinclude "Makefile.inc"
 
-SRCTOP?= ${.CURDIR:H:H}
+SRCTOP= ${.CURDIR:H:H}
 
 # look here first for config.h
 CFLAGS+= -I${.CURDIR}