diff --git a/dav1d-debian-unstable/Dockerfile b/dav1d-debian-unstable/Dockerfile
index a4c8d2497aa299158d16803bdf4ed5223134fd40..f2c0f5f855c2ac14e1fa34bab7972844c6db255e 100644
--- a/dav1d-debian-unstable/Dockerfile
+++ b/dav1d-debian-unstable/Dockerfile
@@ -18,7 +18,7 @@ RUN groupadd --gid ${VIDEOLAN_UID} videolan && \
     apt-get -y dist-upgrade && \
     apt-get install --no-install-suggests --no-install-recommends -y \
         lftp ca-certificates curl git build-essential \
-        nasm clang mold meson ninja-build gcovr \
+        nasm clang libclang-rt-dev mold meson ninja-build gcovr \
         wine wine64 procps doxygen graphviz libsdl2-dev ripgrep && \
     dpkg --add-architecture i386 && \
     apt-get update && \