diff --git a/sys/conf/options b/sys/conf/options
index dac7f80f5418..a181a80718f4 100644
--- a/sys/conf/options
+++ b/sys/conf/options
@@ -75,7 +75,6 @@ SHMMAXPGS	opt_sysvipc.h
 SHMMIN		opt_sysvipc.h
 SHMMNI		opt_sysvipc.h
 SHMSEG		opt_sysvipc.h
-SHM_PHYS_BACKED	opt_sysvipc.h
 SEMMAP		opt_sysvipc.h
 SEMMNI		opt_sysvipc.h
 SEMMNS		opt_sysvipc.h