@@ -1,7 +1,7 @@
 #ifndef UI_DIFF_H
 #define UI_DIFF_H
 
-extern void cgit_print_diff_ctrls();
+extern void cgit_print_diff_ctrls(void);
 
 extern void cgit_print_diff(const char *new_hex, const char *old_hex,
 			    const char *prefix, int show_ctrls, int raw);

@@ -3,6 +3,6 @@ #define UI_REFS_H
 
 extern void cgit_print_branches(int maxcount);
 extern void cgit_print_tags(int maxcount);
-extern void cgit_print_refs();
+extern void cgit_print_refs(void);
 
 #endif /* UI_REFS_H */

@@ -1,7 +1,7 @@
 #ifndef UI_REPOLIST_H
 #define UI_REPOLIST_H
 
-extern void cgit_print_repolist();
-extern void cgit_print_site_readme();
+extern void cgit_print_repolist(void);
+extern void cgit_print_site_readme(void);
 
 #endif /* UI_REPOLIST_H */

@@ -1,11 +1,11 @@
 #ifndef UI_SHARED_H
 #define UI_SHARED_H
 
-extern const char *cgit_httpscheme();
-extern char *cgit_hosturl();
-extern const char *cgit_rooturl();
-extern char *cgit_currenturl();
-extern const char *cgit_loginurl();
+extern const char *cgit_httpscheme(void);
+extern char *cgit_hosturl(void);
+extern const char *cgit_rooturl(void);
+extern char *cgit_currenturl(void);
+extern const char *cgit_loginurl(void);
 extern char *cgit_repourl(const char *reponame);
 extern char *cgit_fileurl(const char *reponame, const char *pagename,
 			  const char *filename, const char *query);
@@ -66,7 +66,7 @@ extern void cgit_print_age(time_t t, time_t max_relative, const char *format);
 extern void cgit_print_http_headers(void);
 extern void cgit_redirect(const char *url, bool permanent);
 extern void cgit_print_docstart(void);
-extern void cgit_print_docend();
+extern void cgit_print_docend(void);
 __attribute__((format (printf,3,4)))
 extern void cgit_print_error_page(int code, const char *msg, const char *fmt, ...);
 extern void cgit_print_pageheader(void);

@@ -13,13 +13,13 @@ #define MAX_SSDIFF_N 128
 #endif
 #define MAX_SSDIFF_SIZE ((MAX_SSDIFF_M) * (MAX_SSDIFF_N))
 
-extern void cgit_ssdiff_print_deferred_lines();
+extern void cgit_ssdiff_print_deferred_lines(void);
 
 extern void cgit_ssdiff_line_cb(char *line, int len);
 
-extern void cgit_ssdiff_header_begin();
-extern void cgit_ssdiff_header_end();
+extern void cgit_ssdiff_header_begin(void);
+extern void cgit_ssdiff_header_end(void);
 
-extern void cgit_ssdiff_footer();
+extern void cgit_ssdiff_footer(void);
 
 #endif /* UI_SSDIFF_H */

@@ -1,7 +1,7 @@
 #ifndef UI_SUMMARY_H
 #define UI_SUMMARY_H
 
-extern void cgit_print_summary();
+extern void cgit_print_summary(void);
 extern void cgit_print_repo_readme(char *path);
 
 #endif /* UI_SUMMARY_H */