diff --git a/srcpkgs/llvm/patches/gcc7-functional.patch b/srcpkgs/llvm/patches/gcc7-functional.patch
new file mode 100644
index 00000000000..23b1525918c
--- /dev/null
+++ b/srcpkgs/llvm/patches/gcc7-functional.patch
@@ -0,0 +1,10 @@
+--- tools/lldb/include/lldb/Utility/TaskPool.h	2016-09-06 22:57:50.000000000 +0200
++++ tools/lldb/include/lldb/Utility/TaskPool.h	2017-05-09 10:11:17.802838086 +0200
+@@ -33,6 +33,7 @@
+ #include <queue>
+ #include <thread>
+ #include <vector>
++#include <functional>
+ 
+ // Global TaskPool class for running tasks in parallel on a set of worker thread
+ // created the first