diff --git a/externals/cryptopp/CMakeLists.txt b/externals/cryptopp/CMakeLists.txt
index 940b5c6b1..c86bc3541 100644
--- a/externals/cryptopp/CMakeLists.txt
+++ b/externals/cryptopp/CMakeLists.txt
@@ -157,6 +157,7 @@ set(cryptopp_SOURCES
         cryptopp/neon-simd.cpp
         cryptopp/oaep.cpp
         cryptopp/osrng.cpp
+        cryptopp/ppc-simd.cpp
         cryptopp/pubkey.cpp
         cryptopp/queue.cpp
         cryptopp/randpool.cpp