diff --git a/admin/CPP-DEFINES b/admin/CPP-DEFINES
index a50a2ab6100..e85d135763d 100644
--- a/admin/CPP-DEFINES
+++ b/admin/CPP-DEFINES
@@ -106,7 +106,6 @@ COFF_BSD_SYMBOLS
 CRT0_DUMMIES
 C_SWITCH_MACHINE
 C_SWITCH_SYSTEM
-C_SWITCH_SYSTEM_TEMACS
 C_SWITCH_X_SYSTEM
 DATA_SEG_BITS
 DATA_START