diff --git a/scrsize.c b/scrsize.c
index b45009a..d71ffd3 100644
--- a/scrsize.c
+++ b/scrsize.c
@@ -37,7 +37,7 @@
 #include <stdio.h>
 
 int
-main()
+main(void)
 {
     char *cp;
     Display *dpy;
diff --git a/w3mbookmark.c b/w3mbookmark.c
index 0c9b8fb..2e64327 100644
--- a/w3mbookmark.c
+++ b/w3mbookmark.c
@@ -181,7 +181,7 @@ insert_bookmark(char *bmark, struct parsed_tagarg *data)
 }
 
 int
-main(int argc, char *argv[])
+main(void)
 {
     extern char *getenv();
     char *p;
diff --git a/w3mhelperpanel.c b/w3mhelperpanel.c
index bedbba5..7d13032 100644
--- a/w3mhelperpanel.c
+++ b/w3mhelperpanel.c
@@ -164,7 +164,7 @@ editMailcap(char *mailcap, struct parsed_tagarg *args)
 }
 
 int
-main(int argc, char *argv[])
+main(void)
 {
     Str mailcapfile;
     extern char *getenv();