diff --git a/src/html-error.c b/src/html-error.c
index 692ff8d..2b32a84 100644
--- a/src/html-error.c
+++ b/src/html-error.c
@@ -192,7 +192,7 @@ send_http_error_message (struct conn_s *connptr)
char *error_file;
FILE *infile;
int ret;
- char *fallback_error =
+ const char *fallback_error =
"\n"
"\n"