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-rw-r--r--src/html-error.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/html-error.c b/src/html-error.c
index 2b32a84..045a334 100644
--- a/src/html-error.c
+++ b/src/html-error.c
@@ -88,7 +88,7 @@ get_html_file (unsigned int errornum)
* Look up the value for a variable.
*/
static char *
-lookup_variable (struct conn_s *connptr, char *varname)
+lookup_variable (struct conn_s *connptr, const char *varname)
{
hashmap_iter result_iter;
char *key;