diff --git a/prospero/include/pmachine.h b/prospero/include/pmachine.h
index b0c51b2..32916ca 100644
--- a/prospero/include/pmachine.h
+++ b/prospero/include/pmachine.h
@@ -28,7 +28,7 @@
 
 #include "pmachine-conf.h" /* lucb */
 
-#ifdef 0 /* lucb */
+#if 0 /* lucb */
 #define P_MACHINE_TYPE 		"SUN"
 #define SUN
 #endif
@@ -44,7 +44,7 @@
  *   include/pmachine.h, lib/pcompat/opendir.c, lib/pcompat/readdir.c
  */
 
-#ifdef 0 /* lucb */
+#if 0 /* lucb */
 #define P_OS_TYPE		"SUNOS"
 #define SUNOS
 #endif