diff --git a/multimedia/ffmpeg4/files/patch-libavfilter_glslang.cpp b/multimedia/ffmpeg4/files/patch-libavfilter_glslang.cpp
new file mode 100644
index 000000000000..a331fdeb349f
--- /dev/null
+++ b/multimedia/ffmpeg4/files/patch-libavfilter_glslang.cpp
@@ -0,0 +1,10 @@
+--- libavfilter/glslang.cpp.orig	2023-04-12 18:01:50 UTC
++++ libavfilter/glslang.cpp
+@@ -16,6 +16,7 @@
+  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+  */
+ 
++#include <cassert>
+ #include <pthread.h>
+ 
+ extern "C" {