diff --git a/lang/cem/lint/llib/proto.make b/lang/cem/lint/llib/proto.make
index 930cac946..a2a9c34e1 100644
--- a/lang/cem/lint/llib/proto.make
+++ b/lang/cem/lint/llib/proto.make
@@ -50,7 +50,7 @@ c.llb:	$(SRC_DIR)/unix7.c
 ansi_c.llb:	$(SRC_DIR)/unix7.c
 	cp $(SRC_DIR)/ansi_c.llb ansi_c.llb
 	chmod +w ansi_c.llb
-	$(LINT) -ansi -Lansi_c.llb -o $(SRC_DIR)/unix7.c
+	$(LINT) -ansi -Lansi_c.llb $(SRC_DIR)/unix7.c
 
 curses.llb:
 	$(LINT) -Lcurses.llb $(CURSESDIR)/*.c
diff --git a/lang/cem/lint/llib/unix7.c b/lang/cem/lint/llib/unix7.c
index cecfb3df4..d475c8489 100644
--- a/lang/cem/lint/llib/unix7.c
+++ b/lang/cem/lint/llib/unix7.c
@@ -88,20 +88,20 @@ int	abort() {/*NOTREACHED*/ }
 	%c = int		%s = char *
 $ */
 #ifdef __STDC__
-int     printf(const char *_format, ...);
+int     printf(const char *_format, ...) { return(0); }
 #else
 printf(fmt) char *fmt; { ; }
 #endif
 
 /* FORMAT1 */
 #ifdef __STDC__
-int     fprintf(FILE *_stream, const char *_format, ...);
+int     fprintf(FILE *_stream, const char *_format, ...) { return(0); }
 #else
 fprintf(fp, fmt) FILE *fp; char *fmt; { ; }
 #endif
 /* FORMAT1 */
 #ifdef __STDC__
-int     sprintf(char *_s, const char *_format, ...);
+int     sprintf(char *_s, const char *_format, ...) { return(0); }
 #else
 sprintf(s, fmt) char *s; char *fmt; { ; }
 #endif
@@ -114,19 +114,19 @@ sprintf(s, fmt) char *s; char *fmt; { ; }
 	%c = char *		%s = char *		%[[] = char *
 $ */
 #ifdef __STDC__
-int     scanf(const char *_format, ...);
+int     scanf(const char *_format, ...) { return(0); }
 #else
 int scanf(fmt) char *fmt; { return(0); }
 #endif
 /* FORMAT1 */
 #ifdef __STDC__
-int     fscanf(FILE *_stream, const char *_format, ...);
+int     fscanf(FILE *_stream, const char *_format, ...) { return(0); }
 #else
 int fscanf(fp, fmt) FILE *fp; char *fmt; { return(0); }
 #endif
 /* FORMAT1 */
 #ifdef __STDC__
-int     sscanf(const char *_s, const char *_format, ...);
+int     sscanf(const char *_s, const char *_format, ...) { return(0); }
 #else
 int sscanf(s, fmt) char *s; char *fmt; { return(0); }
 #endif