diff --git a/client/Makefile.am b/client/Makefile.am
index 88a1f0ff70..b57c559de3 100644
--- a/client/Makefile.am
+++ b/client/Makefile.am
@@ -45,6 +45,7 @@ boinc_client_SOURCES =			\
     time_stats.C				\
     whetstone.C                 \
     ../lib/app_ipc.C			\
+    ../lib/base64.C			\
     ../lib/crypt.C				\
     ../lib/diagnostics.C		\
     ../lib/exception.C			\