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-rw-r--r--src/stdio/ext.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/stdio/ext.c b/src/stdio/ext.c
index d5a403b6..6b8ce91c 100644
--- a/src/stdio/ext.c
+++ b/src/stdio/ext.c
@@ -14,7 +14,7 @@ int __fsetlocking(FILE *f, int type)
int __fwriting(FILE *f)
{
- return f->wend > f->wpos;
+ return f->wend && f->wpos > f->wbase;
}
int __freading(FILE *f)