diff --git a/Ports/diffutils/patches/fix-getdtablesize.patch b/Ports/diffutils/patches/fix-getdtablesize.patch
new file mode 100644
index 00000000000..ead594a4c26
--- /dev/null
+++ b/Ports/diffutils/patches/fix-getdtablesize.patch
@@ -0,0 +1,18 @@
+diff -Naur diffutils-3.5/lib/getdtablesize.c diffutils-3.5.serenity/lib/getdtablesize.c
+--- diffutils-3.5/lib/getdtablesize.c	2021-04-11 06:54:25.712284497 +0200
++++ diffutils-3.5.serenity/lib/getdtablesize.c	2021-04-11 06:52:52.543810671 +0200
+@@ -86,6 +86,7 @@
+ 
+ #else
+ 
++#ifndef __serenity__
+ # include <limits.h>
+ # include <sys/resource.h>
+ 
+@@ -117,5 +118,6 @@
+ 
+   return INT_MAX;
+ }
++#endif
+ 
+ #endif