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Diffstat (limited to 'sys/include/ape/stdio.h')
-rw-r--r--sys/include/ape/stdio.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/sys/include/ape/stdio.h b/sys/include/ape/stdio.h
index b05f41e69..c961a5da1 100644
--- a/sys/include/ape/stdio.h
+++ b/sys/include/ape/stdio.h
@@ -106,7 +106,7 @@ extern int getchar(void);
#define getchar() getc(stdin)
extern char *gets(char *);
extern int putc(int, FILE *);
-#define putc(c, f) ((f)->wp>=(f)->rp?_IO_putc(c, f):((*(f)->wp++=(c))&_IO_CHMASK))
+#define putc(c, f) ((f)->wp>=(f)->rp?_IO_putc(c, f):(*(unsigned char*)(f)->wp++=(c)&_IO_CHMASK))
extern int _IO_putc(int, FILE *);
extern int putchar(int);
#define putchar(c) putc(c, stdout)