diff --git a/sci-misc/stable-diffusion-cpp/stable-diffusion-cpp-9999.ebuild b/sci-misc/stable-diffusion-cpp/stable-diffusion-cpp-9999.ebuild
index 79672cd405..cf49edb9c1 100644
--- a/sci-misc/stable-diffusion-cpp/stable-diffusion-cpp-9999.ebuild
+++ b/sci-misc/stable-diffusion-cpp/stable-diffusion-cpp-9999.ebuild
@@ -32,6 +32,9 @@ REQUIRED_USE="
 		blis
 		flexiblas
 	)
+	webm? (
+		webp
+	)
 	wmma? (
 		rocm
 	)