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-rw-r--r--src/stdio/clearerr.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/src/stdio/clearerr.c b/src/stdio/clearerr.c
index f7d2aac1..9f13851e 100644
--- a/src/stdio/clearerr.c
+++ b/src/stdio/clearerr.c
@@ -7,6 +7,8 @@
void clearerr(FILE * stream)
{
SIGNAL_SAFE(0);
+ ASSERT_STREAM(stream, 0, 0);
+
flockfile(stream);
if (stream != NULL) {
stream->eof = 0;