diff --git a/util/ego/cs/cs_debug.h b/util/ego/cs/cs_debug.h
index 9433ccd25..f7f1694d9 100644
--- a/util/ego/cs/cs_debug.h
+++ b/util/ego/cs/cs_debug.h
@@ -29,10 +29,10 @@ extern SHOWAVAIL();	/* (avail_p avp)
 			 * Shows an available expression.
 			 */
 
-#else TRACE
+#else /* TRACE */
 
 #define OUTAVAILS()
 #define OUTENTITIES()
 #define SHOWAVAIL(x)
 
-#endif TRACE
+#endif /* TRACE */
diff --git a/util/int/fra.h b/util/int/fra.h
index 3926b96cb..3b97ed65e 100644
--- a/util/int/fra.h
+++ b/util/int/fra.h
@@ -15,4 +15,4 @@ extern char *FRA_sh;		/* shadowbytes of Function Return Area */
 
 #define	spoilFRA()
 
-#endif	LOGGING
+#endif	/* LOGGING */
diff --git a/util/led/scan.h b/util/led/scan.h
index 8657f0659..1784d19ea 100644
--- a/util/led/scan.h
+++ b/util/led/scan.h
@@ -14,4 +14,4 @@
 #define IND_CHAR(x)	(IND_NAME(x) + (x).oh_nname * sizeof(struct outname))
 #ifdef SYMDBUG
 #define OFF_DBUG(x)	(OFF_CHAR(x) + (x).oh_nchar)
-#endif SYMDBUG
+#endif /* SYMDBUG */