diff --git a/cf/broken-snprintf.m4 b/cf/broken-snprintf.m4
index 653697e4b..02611166a 100644
--- a/cf/broken-snprintf.m4
+++ b/cf/broken-snprintf.m4
@@ -49,7 +49,7 @@ int bar(int num, int len, ...)
 	return r != len;
 }
 
-int main()
+int main(int argc, char **argv)
 {
 	return foo(0, "12") || bar(0, 2, "12");
 }]])],[:],[ac_cv_func_vsnprintf_working=no],[:]))
diff --git a/cf/krb-func-getcwd-broken.m4 b/cf/krb-func-getcwd-broken.m4
index a33809c87..08b079351 100644
--- a/cf/krb-func-getcwd-broken.m4
+++ b/cf/krb-func-getcwd-broken.m4
@@ -20,7 +20,7 @@ void *popen(char *cmd, char *mode)
 	return 0;
 }
 
-int main()
+int main(int argc, char **argv)
 {
 	char *ret;
 	ret = getcwd(0, 1024);