diff --git a/Dockerfile.emscripten b/Dockerfile.emscripten
index a23df4884daf135045ed03d6c7631d4d09b57acd..bdb18d545f4bd00c800ece9d1f1128825e4b74c1 100644
--- a/Dockerfile.emscripten
+++ b/Dockerfile.emscripten
@@ -12,7 +12,8 @@ RUN apt-get update && \
     git \
     jq \
     autoconf \
-    libtool
+    libtool \
+    protobuf-compiler
 
 FROM supplemented_tools_sdk AS lib_source