diff --git a/src/stdio/vfscanf.c b/src/stdio/vfscanf.c
index 9e030fc4..d990db9f 100644
--- a/src/stdio/vfscanf.c
+++ b/src/stdio/vfscanf.c
@@ -76,6 +76,8 @@ int vfscanf(FILE *restrict f, const char *restrict fmt, va_list ap)
 
 	FLOCK(f);
 
+	if (!f->rpos && __toread(f)) goto input_fail;
+
 	for (p=(const unsigned char *)fmt; *p; p++) {
 
 		alloc = 0;