diff --git a/mach/proto/as/comm1.h b/mach/proto/as/comm1.h
index 206ae0b5d..660f41907 100644
--- a/mach/proto/as/comm1.h
+++ b/mach/proto/as/comm1.h
@@ -155,7 +155,6 @@ void	 emit4(long);
 void	 emitx(valu_t, int);
 void     emitf(int size, int negative);
 void	 emitstr(int);
-void	 ffreopen(char *, FILE *);
 FILE	*ffcreat(char *);
 FILE	*fftemp(char *, char *);
 void	 yyerror(const char *);
diff --git a/mach/proto/as/comm4.c b/mach/proto/as/comm4.c
index 3e88c41ed..9348b802a 100644
--- a/mach/proto/as/comm4.c
+++ b/mach/proto/as/comm4.c
@@ -399,7 +399,7 @@ pass_23(int n)
 #ifdef LISTING
 	listmode >>= 3;
 	if (listmode & 4)
-		ffreopen(listpath, listfile);
+		rewind(listfile);
 	listeoln = 1;
 #endif
 #ifdef THREE_PASS
@@ -438,7 +438,7 @@ pass_23(int n)
 #ifndef ASLD
 	newmodule(modulename);
 #endif /* ASLD */
-	ffreopen(temppath, tempfile);
+	rewind(tempfile);
 	yyparse();
 	commfinish();
 	machfinish(n);
diff --git a/mach/proto/as/comm7.c b/mach/proto/as/comm7.c
index c48de4d92..debee0ca2 100644
--- a/mach/proto/as/comm7.c
+++ b/mach/proto/as/comm7.c
@@ -389,17 +389,11 @@ void emitf(int size, int negative)
 
 /* ---------- Error checked file I/O  ---------- */
 
-void ffreopen(char* s, FILE* f)
-{
-	if (freopen(s, "r", f) == NULL)
-		fatal("can't reopen %s: %s", s, strerror(errno));
-}
-
 FILE* ffcreat(char* s)
 {
 	FILE* f;
 
-	if ((f = fopen(s, "w")) == NULL)
+	if ((f = fopen(s, "w+")) == NULL)
 		fatal("can't create %s", s);
 	return (f);
 }