diff --git a/srcpkgs/blackboxwm/patches/d3481ee7b7d104ef53ead4d35b9a9254c64bb87a.patch b/srcpkgs/blackboxwm/patches/d3481ee7b7d104ef53ead4d35b9a9254c64bb87a.patch
new file mode 100644
index 00000000000..f12c8210e33
--- /dev/null
+++ b/srcpkgs/blackboxwm/patches/d3481ee7b7d104ef53ead4d35b9a9254c64bb87a.patch
@@ -0,0 +1,38 @@
+From d3481ee7b7d104ef53ead4d35b9a9254c64bb87a Mon Sep 17 00:00:00 2001
+From: Sam James <sam@gentoo.org>
+Date: Sun, 12 Jun 2022 20:49:09 +0100
+Subject: [PATCH] Fix build with GCC 12 (missing <time.h> include)
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+Fixes build failure with GCC 12:
+```
+Toolbar.cc: In member function ‘void Toolbar::reconfigure()’:
+Toolbar.cc:260:17: error: ‘time’ was not declared in this scope; did you mean ‘Time’?
+  260 |   time_t ttmp = time(NULL);
+      |                 ^~~~
+      |                 Time
+Toolbar.cc:265:21: error: ‘localtime’ was not declared in this scope; did you mean ‘clock_timer’?
+  265 |     struct tm *tt = localtime(&ttmp);
+      |                     ^~~~~~~~~
+      |                     clock_timer
+```
+
+Bug: https://bugs.gentoo.org/851603
+---
+ src/Toolbar.cc | 1 +
+ 1 file changed, 1 insertion(+)
+
+diff --git a/src/Toolbar.cc b/src/Toolbar.cc
+index e88b8f6b..8ccad201 100644
+--- a/src/Toolbar.cc
++++ b/src/Toolbar.cc
+@@ -38,6 +38,7 @@
+ #include <X11/Xutil.h>
+ #include <sys/time.h>
+ #include <assert.h>
++#include <time.h>
+ 
+ 
+ long nextTimeout(int resolution)