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-rw-r--r--render/form.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/render/form.c b/render/form.c
index 6af143be0..f82877504 100644
--- a/render/form.c
+++ b/render/form.c
@@ -641,7 +641,7 @@ char *form_acceptable_charset(struct form *form)
/* make it upper case */
for (c = temp; *c; c++)
- *c = toupper(c);
+ *c = toupper(*c);
/* is UTF-8 specified? */
c = strstr(temp, "UTF-8");