diff --git a/src/mudsys/fopen.63 b/src/mudsys/fopen.63
index af6e1a50..48fa1692 100644
--- a/src/mudsys/fopen.63
+++ b/src/mudsys/fopen.63
@@ -4475,7 +4475,7 @@ GTINTC:	PUSH	TP,$TCHAN	;SAVE THE CHANNEL...WE'LL CLOBBER B
 	PUSH	P,0
 	PUSH	TP,$TCHAN
 	PUSH	TP,B
-	MCALL	1,INTFCN-1(B)
+	.MCALL	1,INTFCN-1(B)
 	GETYP	A,A
 	CAIE	A,TCHRS
 	JRST	BADRET
@@ -4506,7 +4506,7 @@ PTINTC:	PUSH	TP,$TCHAN	;SAVE THE CHANNEL...WE'LL CLOBBER B
 	PUSH	TP,A		;PUSH THE CHAR
 	PUSH	TP,$TCHAN	;PUSH THE CHANNEL
 	PUSH	TP,B
-	MCALL	2,INTFCN-1(B)	;APPLY THE FUNCTION TO THE CHAR
+	.MCALL	2,INTFCN-1(B)	;APPLY THE FUNCTION TO THE CHAR
 	JRST	INTRET