diff --git a/Libraries/LibC/unistd.h b/Libraries/LibC/unistd.h
index a0bee9a3b8..cfbb07d3b1 100644
--- a/Libraries/LibC/unistd.h
+++ b/Libraries/LibC/unistd.h
@@ -37,6 +37,7 @@
 #include <limits.h>
 #include <sys/cdefs.h>
 #include <sys/types.h>
+#include <getopt.h>
 
 __BEGIN_DECLS