diff --git a/Limelight/Crypto/mkcert.h b/Limelight/Crypto/mkcert.h
index f3c62f8b..106f2f6c 100644
--- a/Limelight/Crypto/mkcert.h
+++ b/Limelight/Crypto/mkcert.h
@@ -9,6 +9,7 @@
 #ifndef Limelight_mkcert_h
 #define Limelight_mkcert_h
 
+#include <sys/_types/_time_t.h>
 #include <openssl/x509v3.h>
 #include <openssl/pkcs12.h>