--- unzip60/unix/configure	2009-01-17 22:57:24
+++ unzip60/unix/configure	2026-02-27 21:12:00
@@ -418,7 +418,11 @@
 
 echo Check for directory libraries
 cat > conftest.c << _EOF_
-int main() { return closedir(opendir(".")); }
+#include <sys/types.h>
+#include <dirent.h>
+int main() {
+  return closedir(opendir("."));
+}
 _EOF_
 
 $CC -o conftest conftest.c >/dev/null 2>/dev/null