diff --git a/cgi/canned_responses.c b/cgi/canned_responses.c
line changes: +1/-1
index 3b09913..b1da932
--- a/cgi/canned_responses.c
+++ b/cgi/canned_responses.c

@@ -6,7 +6,7 @@
 #include "canned_responses.h"
 #include "app.h"
 
-void respond_simple_data(unsigned const char *data, int len) {
+void respond_simple_data(const char *data, int len) {
 	printf("Content-length: %d\r\n\r\n", len);
 	fwrite(data, len, 1, stdout);
 }

diff --git a/cgi/canned_responses.h b/cgi/canned_responses.h
line changes: +1/-1
index 9ae878d..aba5803
--- a/cgi/canned_responses.h
+++ b/cgi/canned_responses.h

@@ -4,7 +4,7 @@
 #ifndef _CANNED_RESPONSES
 #define _CANNED_RESPONSES
 
-void respond_simple_data(unsigned const char *data, int len);
+void respond_simple_data(const char *data, int len);
 void respond_403();
 void respond_404();
 void respond_405();